2556391336 has 32 divisors (see below), whose sum is σ = 4873104000. Its totient is φ = 1257025536.

The previous prime is 2556391319. The next prime is 2556391339. The reversal of 2556391336 is 6331936552.

It is a junction number, because it is equal to n+sod(n) for n = 2556391292 and 2556391301.

It is not an unprimeable number, because it can be changed into a prime (2556391339) 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, 154555 + ... + 170293.

It is an arithmetic number, because the mean of its divisors is an integer number (152284500).

Almost surely, 2^2556391336 is an apocalyptic number.

It is an amenable number.

2556391336 is a deficient number, since it is larger than the sum of its proper divisors (2316712664).

2556391336 is a wasteful number, since it uses less digits than its factorization.

2556391336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16081 (or 16077 counting only the distinct ones).

The product of its digits is 437400, while the sum is 43.

The square root of 2556391336 is about 50560.7687441558. The cubic root of 2556391336 is about 1367.3376708411.

The spelling of 2556391336 in words is "two billion, five hundred fifty-six million, three hundred ninety-one thousand, three hundred thirty-six".