561240066834 has 40 divisors (see below), whose sum is σ = 1323782621040. Its totient is φ = 177233704344.

The previous prime is 561240066791. The next prime is 561240066899. The reversal of 561240066834 is 438660042165.

561240066834 is a `hidden beast` number, since 561 + 2 + 4 + 0 + 0 + 6 + 6 + 83 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 561240066834.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 91166524 + ... + 91172679.

It is an arithmetic number, because the mean of its divisors is an integer number (33094565526).

Almost surely, 2^561240066834 is an apocalyptic number.

561240066834 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

561240066834 is an abundant number, since it is smaller than the sum of its proper divisors (762542554206).

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

561240066834 is a wasteful number, since it uses less digits than its factorization.

561240066834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182339236 (or 182339227 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 561240066834 in words is "five hundred sixty-one billion, two hundred forty million, sixty-six thousand, eight hundred thirty-four".