2564655164 has 6 divisors (see below), whose sum is σ = 4488146544. Its totient is φ = 1282327580.

The previous prime is 2564655151. The next prime is 2564655167. The reversal of 2564655164 is 4615564652.

It is a super-2 number, since 2×2564655164² = 13154912220463733792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564655167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320581892 + ... + 320581899.

It is an arithmetic number, because the mean of its divisors is an integer number (748024424).

Almost surely, 2^2564655164 is an apocalyptic number.

It is an amenable number.

2564655164 is a deficient number, since it is larger than the sum of its proper divisors (1923491380).

2564655164 is a wasteful number, since it uses less digits than its factorization.

2564655164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641163795 (or 641163793 counting only the distinct ones).

The product of its digits is 864000, while the sum is 44.

The square root of 2564655164 is about 50642.4245470139. The cubic root of 2564655164 is about 1368.8094446664.

The spelling of 2564655164 in words is "two billion, five hundred sixty-four million, six hundred fifty-five thousand, one hundred sixty-four".