2557701256 has 32 divisors (see below), whose sum is σ = 5243551200. Its totient is φ = 1159949440.

The previous prime is 2557701233. The next prime is 2557701329. The reversal of 2557701256 is 6521077552.

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, 6180 + ... + 71788.

It is an arithmetic number, because the mean of its divisors is an integer number (163860975).

Almost surely, 2^2557701256 is an apocalyptic number.

It is an amenable number.

2557701256 is an abundant number, since it is smaller than the sum of its proper divisors (2685849944).

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

2557701256 is a wasteful number, since it uses less digits than its factorization.

2557701256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66069 (or 66065 counting only the distinct ones).

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 2557701256 is about 50573.7210021173. The cubic root of 2557701256 is about 1367.5711767076.

The spelling of 2557701256 in words is "two billion, five hundred fifty-seven million, seven hundred one thousand, two hundred fifty-six".