2564870864 has 10 divisors (see below), whose sum is σ = 4969437330. Its totient is φ = 1282435424.

The previous prime is 2564870863. The next prime is 2564870873. The reversal of 2564870864 is 4680784652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1900262464 + 664608400 = 43592^2 + 25780^2 .

It is a super-2 number, since 2×2564870864² = 13157125097992212992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564870863) by changing a digit.

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, 80152199 + ... + 80152230.

It is an arithmetic number, because the mean of its divisors is an integer number (496943733).

Almost surely, 2^2564870864 is an apocalyptic number.

It is an amenable number.

2564870864 is a deficient number, since it is larger than the sum of its proper divisors (2404566466).

2564870864 is a wasteful number, since it uses less digits than its factorization.

2564870864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160304437 (or 160304431 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The square root of 2564870864 is about 50644.5541396111. The cubic root of 2564870864 is about 1368.8478181060.

The spelling of 2564870864 in words is "two billion, five hundred sixty-four million, eight hundred seventy thousand, eight hundred sixty-four".