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68690119744 = 261814
BaseRepresentation
bin111111111110010000…
…000000110001000000
320120022010120121222001
4333332100000301000
52111134132312434
651320015353344
74651130245531
oct777620006100
9216263517861
1068690119744
1127149866704
1211390222854
136628c6048c
143478a82688
151bc061d114
hexffe400c40

68690119744 has 35 divisors (see below), whose sum is σ = 137064217235. Its totient is φ = 34155308160.

The previous prime is 68690119739. The next prime is 68690119747. The reversal of 68690119744 is 44791109686.

The square root of 68690119744 is 262088.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 65695841344 + 2994278400 = 256312^2 + 54720^2 .

It is an ABA number since it can be written as A⋅BA, here for A=4, B=362.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68690119747) by changing a digit.

It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 379503334 + ... + 379503514.

Almost surely, 268690119744 is an apocalyptic number.

68690119744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

68690119744 is the 262088-th square number.

It is an amenable number.

68690119744 is a deficient number, since it is larger than the sum of its proper divisors (68374097491).

68690119744 is an frugal number, since it uses more digits than its factorization.

68690119744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 68690119744 in words is "sixty-eight billion, six hundred ninety million, one hundred nineteen thousand, seven hundred forty-four".

Divisors: 1 2 4 8 16 32 64 181 362 724 1448 2896 5792 11584 32761 65522 131044 262088 524176 1048352 2096704 5929741 11859482 23718964 47437928 94875856 189751712 379503424 1073283121 2146566242 4293132484 8586264968 17172529936 34345059872 68690119744