2557750656 has 32 divisors (see below), whose sum is σ = 6794026200. Its totient is φ = 852583424.

The previous prime is 2557750649. The next prime is 2557750687. The reversal of 2557750656 is 6560577552.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 3330021 + ... + 3330788.

Almost surely, 2^2557750656 is an apocalyptic number.

It is an amenable number.

2557750656 is an abundant number, since it is smaller than the sum of its proper divisors (4236275544).

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

2557750656 is an equidigital number, since it uses as much as digits as its factorization.

2557750656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660826 (or 6660814 counting only the distinct ones).

The product of its (nonzero) digits is 2205000, while the sum is 48.

The square root of 2557750656 is about 50574.2093956989. The cubic root of 2557750656 is about 1367.5799811736.

The spelling of 2557750656 in words is "two billion, five hundred fifty-seven million, seven hundred fifty thousand, six hundred fifty-six".