2556913768 has 32 divisors (see below), whose sum is σ = 4951643400. Its totient is φ = 1237137408.

The previous prime is 2556913741. The next prime is 2556913769. The reversal of 2556913768 is 8673196552.

It can be written as a sum of positive squares in 4 ways, for example, as 1955585284 + 601328484 = 44222^2 + 24522^2 .

It is not an unprimeable number, because it can be changed into a prime (2556913769) 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, 10353 + ... + 72256.

Almost surely, 2^2556913768 is an apocalyptic number.

It is an amenable number.

2556913768 is a deficient number, since it is larger than the sum of its proper divisors (2394729632).

2556913768 is a wasteful number, since it uses less digits than its factorization.

2556913768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82741 (or 82737 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 52.

The square root of 2556913768 is about 50565.9348573721. The cubic root of 2556913768 is about 1367.4308089414.

The spelling of 2556913768 in words is "two billion, five hundred fifty-six million, nine hundred thirteen thousand, seven hundred sixty-eight".