2557403347656 has 32 divisors (see below), whose sum is σ = 6514140605760. Its totient is φ = 836383484352.

The previous prime is 2557403347637. The next prime is 2557403347679. The reversal of 2557403347656 is 6567433047552.

It is a junction number, because it is equal to n+sod(n) for n = 2557403347596 and 2557403347605.

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, 1005267340 + ... + 1005269883.

It is an arithmetic number, because the mean of its divisors is an integer number (203566893930).

Almost surely, 2^{2557403347656} is an apocalyptic number.

It is an amenable number.

2557403347656 is an abundant number, since it is smaller than the sum of its proper divisors (3956737258104).

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

2557403347656 is a wasteful number, since it uses less digits than its factorization.

2557403347656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010537285 (or 2010537281 counting only the distinct ones).

The product of its (nonzero) digits is 63504000, while the sum is 57.

The spelling of 2557403347656 in words is "two trillion, five hundred fifty-seven billion, four hundred three million, three hundred forty-seven thousand, six hundred fifty-six".