561334642542 has 32 divisors (see below), whose sum is σ = 1247738780160. Its totient is φ = 187062278040.

The previous prime is 561334642499. The next prime is 561334642553. The reversal of 561334642542 is 245246433165.

561334642542 is a `hidden beast` number, since 5 + 6 + 1 + 334 + 64 + 254 + 2 = 666.

561334642542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1161334 + ... + 1572057.

It is an arithmetic number, because the mean of its divisors is an integer number (38991836880).

Almost surely, 2^561334642542 is an apocalyptic number.

561334642542 is an abundant number, since it is smaller than the sum of its proper divisors (686404137618).

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

561334642542 is a wasteful number, since it uses less digits than its factorization.

561334642542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737205 (or 2737199 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 45.

The spelling of 561334642542 in words is "five hundred sixty-one billion, three hundred thirty-four million, six hundred forty-two thousand, five hundred forty-two".