2564655902 has 16 divisors (see below), whose sum is σ = 3932222112. Its totient is φ = 1254071520.

The previous prime is 2564655901. The next prime is 2564655937. The reversal of 2564655902 is 2095564652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564655901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5933 + ... + 71864.

It is an arithmetic number, because the mean of its divisors is an integer number (245763882).

Almost surely, 2^2564655902 is an apocalyptic number.

2564655902 is a deficient number, since it is larger than the sum of its proper divisors (1367566210).

2564655902 is a wasteful number, since it uses less digits than its factorization.

2564655902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78163.

The product of its (nonzero) digits is 648000, while the sum is 44.

The square root of 2564655902 is about 50642.4318333944. The cubic root of 2564655902 is about 1368.8095759617.

The spelling of 2564655902 in words is "two billion, five hundred sixty-four million, six hundred fifty-five thousand, nine hundred two".