2557156064 has 24 divisors (see below), whose sum is σ = 5036450328. Its totient is φ = 1278057600.

The previous prime is 2557156033. The next prime is 2557156073. The reversal of 2557156064 is 4606517552.

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, 70739 + ... + 100589.

It is an arithmetic number, because the mean of its divisors is an integer number (209852097).

Almost surely, 2^2557156064 is an apocalyptic number.

It is an amenable number.

2557156064 is a deficient number, since it is larger than the sum of its proper divisors (2479294264).

2557156064 is a wasteful number, since it uses less digits than its factorization.

2557156064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32538 (or 32530 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 41.

The square root of 2557156064 is about 50568.3306428045. The cubic root of 2557156064 is about 1367.4740006665.

The spelling of 2557156064 in words is "two billion, five hundred fifty-seven million, one hundred fifty-six thousand, sixty-four".