256765512 has 32 divisors (see below), whose sum is σ = 655574400. Its totient is φ = 83767104.

The previous prime is 256765469. The next prime is 256765517. The reversal of 256765512 is 215567652.

It is not an unprimeable number, because it can be changed into a prime (256765517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112687 + ... + 114942.

It is an arithmetic number, because the mean of its divisors is an integer number (20486700).

Almost surely, 2^256765512 is an apocalyptic number.

It is an amenable number.

256765512 is an abundant number, since it is smaller than the sum of its proper divisors (398808888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256765512 is a wasteful number, since it uses less digits than its factorization.

256765512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227685 (or 227681 counting only the distinct ones).

The product of its digits is 126000, while the sum is 39.

The square root of 256765512 is about 16023.9043931247. The cubic root of 256765512 is about 635.5926943937.

The spelling of 256765512 in words is "two hundred fifty-six million, seven hundred sixty-five thousand, five hundred twelve".