2556264015 has 72 divisors (see below), whose sum is σ = 4761469440. Its totient is φ = 1315839168.

The previous prime is 2556263993. The next prime is 2556264019. The reversal of 2556264015 is 5104626552.

2556264015 is a `hidden beast` number, since 2 + 5 + 5 + 6 + 2 + 640 + 1 + 5 = 666.

It is not a de Polignac number, because 2556264015 - 2¹⁸ = 2556001871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556264019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 950002 + ... + 952688.

It is an arithmetic number, because the mean of its divisors is an integer number (66131520).

Almost surely, 2^2556264015 is an apocalyptic number.

2556264015 is a deficient number, since it is larger than the sum of its proper divisors (2205205425).

2556264015 is an frugal number, since it uses more digits than its factorization.

2556264015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745 (or 2724 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 2556264015 is about 50559.5096396316. The cubic root of 2556264015 is about 1367.3149703925.

The spelling of 2556264015 in words is "two billion, five hundred fifty-six million, two hundred sixty-four thousand, fifteen".