256584262779 has 12 divisors (see below), whose sum is σ = 399131075616. Its totient is φ = 157898007792.

The previous prime is 256584262757. The next prime is 256584262817. The reversal of 256584262779 is 977262485652.

256584262779 is a `hidden beast` number, since 2 + 5 + 6 + 584 + 26 + 27 + 7 + 9 = 666.

It is not a de Polignac number, because 256584262779 - 2²³ = 256575874171 is a prime.

It is a super-3 number, since 3×256584262779³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (256584262679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1096513827 + ... + 1096514060.

It is an arithmetic number, because the mean of its divisors is an integer number (33260922968).

Almost surely, 2^256584262779 is an apocalyptic number.

256584262779 is a deficient number, since it is larger than the sum of its proper divisors (142546812837).

256584262779 is a wasteful number, since it uses less digits than its factorization.

256584262779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193027906 (or 2193027903 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 63.

The spelling of 256584262779 in words is "two hundred fifty-six billion, five hundred eighty-four million, two hundred sixty-two thousand, seven hundred seventy-nine".