256004564080 has 40 divisors (see below), whose sum is σ = 595236103344. Its totient is φ = 102397440000.

The previous prime is 256004564077. The next prime is 256004564089. The reversal of 256004564080 is 80465400652.

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256004564089) 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, 2334480 + ... + 2441680.

Almost surely, 2^256004564080 is an apocalyptic number.

256004564080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256004564080 is an abundant number, since it is smaller than the sum of its proper divisors (339231539264).

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

256004564080 is a wasteful number, since it uses less digits than its factorization.

256004564080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137065 (or 137059 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 256004564080 in words is "two hundred fifty-six billion, four million, five hundred sixty-four thousand, eighty".