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12857068955 = 52571413791
BaseRepresentation
bin10111111100101011…
…10100110110011011
31020012000211202221002
423332111310312123
5202312402201310
65523443335215
7633416166023
oct137625646633
936160752832
1012857068955
1154a8531225
1225a998150b
13129b8a9513
1489d7a0a83
15503b1bda5
hex2fe574d9b

12857068955 has 4 divisors (see below), whose sum is σ = 15428482752. Its totient is φ = 10285655160.

The previous prime is 12857068951. The next prime is 12857068967. The reversal of 12857068955 is 55986075821.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12857068955 - 22 = 12857068951 is a prime.

It is a super-2 number, since 2×128570689552 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12857068955.

It is not an unprimeable number, because it can be changed into a prime (12857068951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285706891 + ... + 1285706900.

It is an arithmetic number, because the mean of its divisors is an integer number (3857120688).

Almost surely, 212857068955 is an apocalyptic number.

12857068955 is a deficient number, since it is larger than the sum of its proper divisors (2571413797).

12857068955 is an equidigital number, since it uses as much as digits as its factorization.

12857068955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571413796.

The product of its (nonzero) digits is 6048000, while the sum is 56.

The spelling of 12857068955 in words is "twelve billion, eight hundred fifty-seven million, sixty-eight thousand, nine hundred fifty-five".

Divisors: 1 5 2571413791 12857068955