256507175311377 has 16 divisors (see below), whose sum is σ = 343563981053760. Its totient is φ = 170228624715072.

The previous prime is 256507175311327. The next prime is 256507175311391. The reversal of 256507175311377 is 773113571705652.

It is not a de Polignac number, because 256507175311377 - 2¹⁸ = 256507175049233 is a prime.

It is a super-3 number, since 3×256507175311377³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 256507175311377.

It is not an unprimeable number, because it can be changed into a prime (256507175311327) 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, 130040383 + ... + 131998164.

It is an arithmetic number, because the mean of its divisors is an integer number (21472748815860).

Almost surely, 2^{256507175311377} is an apocalyptic number.

It is an amenable number.

256507175311377 is a deficient number, since it is larger than the sum of its proper divisors (87056805742383).

256507175311377 is a wasteful number, since it uses less digits than its factorization.

256507175311377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262040032.

The product of its (nonzero) digits is 32413500, while the sum is 60.

The spelling of 256507175311377 in words is "two hundred fifty-six trillion, five hundred seven billion, one hundred seventy-five million, three hundred eleven thousand, three hundred seventy-seven".