256743500662315 has 16 divisors (see below), whose sum is σ = 308399072901120. Its totient is φ = 205190225048160.

The previous prime is 256743500662309. The next prime is 256743500662339. The reversal of 256743500662315 is 513266005347652.

It is not a de Polignac number, because 256743500662315 - 2³ = 256743500662307 is a prime.

It is a super-2 number, since 2×256743500662315² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386720200 + ... + 387383530.

It is an arithmetic number, because the mean of its divisors is an integer number (19274942056320).

Almost surely, 2^{256743500662315} is an apocalyptic number.

256743500662315 is a deficient number, since it is larger than the sum of its proper divisors (51655572238805).

256743500662315 is a wasteful number, since it uses less digits than its factorization.

256743500662315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740322.

The product of its (nonzero) digits is 27216000, while the sum is 55.

The spelling of 256743500662315 in words is "two hundred fifty-six trillion, seven hundred forty-three billion, five hundred million, six hundred sixty-two thousand, three hundred fifteen".