256012157265 has 8 divisors (see below), whose sum is σ = 409619451648. Its totient is φ = 136539817200.

The previous prime is 256012157251. The next prime is 256012157341. The reversal of 256012157265 is 562751210652.

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

It is not a de Polignac number, because 256012157265 - 2¹⁰ = 256012156241 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8533738561 + ... + 8533738590.

It is an arithmetic number, because the mean of its divisors is an integer number (51202431456).

Almost surely, 2^256012157265 is an apocalyptic number.

It is an amenable number.

256012157265 is a deficient number, since it is larger than the sum of its proper divisors (153607294383).

256012157265 is a wasteful number, since it uses less digits than its factorization.

256012157265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17067477159.

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 256012157265 in words is "two hundred fifty-six billion, twelve million, one hundred fifty-seven thousand, two hundred sixty-five".