256536764 has 12 divisors (see below), whose sum is σ = 489752088. Its totient is φ = 116607600.

The previous prime is 256536751. The next prime is 256536793. The reversal of 256536764 is 467635652.

It is a happy number.

It is a super-2 number, since 2×256536764² = 131622222567183392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 5830381 = 256536764 / (2 + 5 + 6 + 5 + 3 + 6 + 7 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2915147 + ... + 2915234.

It is an arithmetic number, because the mean of its divisors is an integer number (40812674).

Almost surely, 2^256536764 is an apocalyptic number.

It is an amenable number.

256536764 is a deficient number, since it is larger than the sum of its proper divisors (233215324).

256536764 is a wasteful number, since it uses less digits than its factorization.

256536764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830396 (or 5830394 counting only the distinct ones).

The product of its digits is 907200, while the sum is 44.

The square root of 256536764 is about 16016.7650916157. The cubic root of 256536764 is about 635.4038920980.

The spelling of 256536764 in words is "two hundred fifty-six million, five hundred thirty-six thousand, seven hundred sixty-four".