256774477652 has 72 divisors (see below), whose sum is σ = 585652694592. Its totient is φ = 95692291200.

The previous prime is 256774477627. The next prime is 256774477681.

256774477652 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 625049 + ... + 950912.

Almost surely, 2^256774477652 is an apocalyptic number.

256774477652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256774477652 is an abundant number, since it is smaller than the sum of its proper divisors (328878216940).

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

256774477652 is a wasteful number, since it uses less digits than its factorization.

256774477652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576029 (or 1576004 counting only the distinct ones).

The product of its digits is 138297600, while the sum is 62.

The spelling of 256774477652 in words is "two hundred fifty-six billion, seven hundred seventy-four million, four hundred seventy-seven thousand, six hundred fifty-two".