2561188502 has 16 divisors (see below), whose sum is σ = 3932991072. Its totient is φ = 1250539200.

The previous prime is 2561188493. The next prime is 2561188537. The reversal of 2561188502 is 2058811652.

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 in 7 ways as a sum of consecutive naturals, for example, 72098 + ... + 101589.

It is an arithmetic number, because the mean of its divisors is an integer number (245811942).

Almost surely, 2^2561188502 is an apocalyptic number.

2561188502 is a deficient number, since it is larger than the sum of its proper divisors (1371802570).

2561188502 is a wasteful number, since it uses less digits than its factorization.

2561188502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173863.

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 2561188502 is about 50608.1861164772. The cubic root of 2561188502 is about 1368.1924235297.

The spelling of 2561188502 in words is "two billion, five hundred sixty-one million, one hundred eighty-eight thousand, five hundred two".