2564164756 has 6 divisors (see below), whose sum is σ = 4487288330. Its totient is φ = 1282082376.

The previous prime is 2564164739. The next prime is 2564164763. The reversal of 2564164756 is 6574614652.

It can be written as a sum of positive squares in only one way, i.e., 1741392900 + 822771856 = 41730^2 + 28684^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320520591 + ... + 320520598.

Almost surely, 2^2564164756 is an apocalyptic number.

It is an amenable number.

2564164756 is a deficient number, since it is larger than the sum of its proper divisors (1923123574).

2564164756 is a wasteful number, since it uses less digits than its factorization.

2564164756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641041193 (or 641041191 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 46.

The square root of 2564164756 is about 50637.5824462424. The cubic root of 2564164756 is about 1368.7221921444.

The spelling of 2564164756 in words is "two billion, five hundred sixty-four million, one hundred sixty-four thousand, seven hundred fifty-six".