561507438260 has 24 divisors (see below), whose sum is σ = 1192414676040. Its totient is φ = 222079345664.

The previous prime is 561507438259. The next prime is 561507438337. The reversal of 561507438260 is 62834705165.

561507438260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 107818976164 + 453688462096 = 328358^2 + 673564^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157725029 + ... + 157728588.

It is an arithmetic number, because the mean of its divisors is an integer number (49683944835).

Almost surely, 2^561507438260 is an apocalyptic number.

It is an amenable number.

561507438260 is an abundant number, since it is smaller than the sum of its proper divisors (630907237780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561507438260 is a wasteful number, since it uses less digits than its factorization.

561507438260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315453715 (or 315453713 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 561507438260 in words is "five hundred sixty-one billion, five hundred seven million, four hundred thirty-eight thousand, two hundred sixty".