256867871351 has 16 divisors (see below), whose sum is σ = 319275233088. Its totient is φ = 201223872000.

The previous prime is 256867871329. The next prime is 256867871363. The reversal of 256867871351 is 153178768652.

It is a cyclic number.

It is not a de Polignac number, because 256867871351 - 2¹⁰ = 256867870327 is a prime.

It is a super-2 number, since 2×256867871351² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256867871321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13964690 + ... + 13983071.

It is an arithmetic number, because the mean of its divisors is an integer number (19954702068).

Almost surely, 2^256867871351 is an apocalyptic number.

256867871351 is a deficient number, since it is larger than the sum of its proper divisors (62407361737).

256867871351 is a wasteful number, since it uses less digits than its factorization.

256867871351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27947882.

The product of its digits is 16934400, while the sum is 59.

The spelling of 256867871351 in words is "two hundred fifty-six billion, eight hundred sixty-seven million, eight hundred seventy-one thousand, three hundred fifty-one".