2556164049 has 12 divisors (see below), whose sum is σ = 3420223344. Its totient is φ = 1698114024.

The previous prime is 2556164027. The next prime is 2556164057. The reversal of 2556164049 is 9404616552.

It is not a de Polignac number, because 2556164049 - 2⁸ = 2556163793 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2556164049.

It is not an unprimeable number, because it can be changed into a prime (2556164549) 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 11 ways as a sum of consecutive naturals, for example, 1630464 + ... + 1632030.

It is an arithmetic number, because the mean of its divisors is an integer number (285018612).

Almost surely, 2^2556164049 is an apocalyptic number.

It is an amenable number.

2556164049 is a deficient number, since it is larger than the sum of its proper divisors (864059295).

2556164049 is an frugal number, since it uses more digits than its factorization.

2556164049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484 (or 1917 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 2556164049 is about 50558.5210325619. The cubic root of 2556164049 is about 1367.2971466219.

The spelling of 2556164049 in words is "two billion, five hundred fifty-six million, one hundred sixty-four thousand, forty-nine".