256774500560 has 40 divisors (see below), whose sum is σ = 622957271040. Its totient is φ = 98244156032.

The previous prime is 256774500481. The next prime is 256774500607. The reversal of 256774500560 is 65005477652.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent 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, 69773840 + ... + 69777519.

It is an arithmetic number, because the mean of its divisors is an integer number (15573931776).

Almost surely, 2^256774500560 is an apocalyptic number.

256774500560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256774500560 is an abundant number, since it is smaller than the sum of its proper divisors (366182770480).

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

256774500560 is a wasteful number, since it uses less digits than its factorization.

256774500560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139551395 (or 139551389 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 47.

The spelling of 256774500560 in words is "two hundred fifty-six billion, seven hundred seventy-four million, five hundred thousand, five hundred sixty".