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67842826081 = 719775912161
BaseRepresentation
bin111111001011101111…
…110101111101100001
320111010002020122120021
4333023233311331201
52102420230413311
651055551113441
74621131335602
oct771357657541
9214102218507
1067842826081
1126854563408
1211194512881
13652255bc94
1433d8325da9
151b71053171
hexfcbbf5f61

67842826081 has 8 divisors (see below), whose sum is σ = 67951526400. Its totient is φ = 67734167040.

The previous prime is 67842826069. The next prime is 67842826123. The reversal of 67842826081 is 18062824876.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67842826081 - 215 = 67842793313 is a prime.

It is a super-2 number, since 2×678428260812 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67842827081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5572641 + ... + 5584801.

It is an arithmetic number, because the mean of its divisors is an integer number (8493940800).

Almost surely, 267842826081 is an apocalyptic number.

It is an amenable number.

67842826081 is a deficient number, since it is larger than the sum of its proper divisors (108700319).

67842826081 is a wasteful number, since it uses less digits than its factorization.

67842826081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20639.

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 67842826081 in words is "sixty-seven billion, eight hundred forty-two million, eight hundred twenty-six thousand, eighty-one".

Divisors: 1 719 7759 12161 5578721 8743759 94357199 67842826081