2556513784 has 16 divisors (see below), whose sum is σ = 5229232920. Its totient is φ = 1162051680.

The previous prime is 2556513767. The next prime is 2556513833. The reversal of 2556513784 is 4873156552.

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, 14525559 + ... + 14525734.

Almost surely, 2^2556513784 is an apocalyptic number.

It is an amenable number.

2556513784 is an abundant number, since it is smaller than the sum of its proper divisors (2672719136).

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

2556513784 is a wasteful number, since it uses less digits than its factorization.

2556513784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29051310 (or 29051306 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 46.

The square root of 2556513784 is about 50561.9796289663. The cubic root of 2556513784 is about 1367.3595017566.

The spelling of 2556513784 in words is "two billion, five hundred fifty-six million, five hundred thirteen thousand, seven hundred eighty-four".