561648742232766 has 16 divisors (see below), whose sum is σ = 1182418404700800. Its totient is φ = 177362760705048.

The previous prime is 561648742232759. The next prime is 561648742232779. The reversal of 561648742232766 is 667232247846165.

It is a self number, because there is not a number n which added to its sum of digits gives 561648742232766.

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, 2463371676346 + ... + 2463371676573.

It is an arithmetic number, because the mean of its divisors is an integer number (73901150293800).

Almost surely, 2^{561648742232766} is an apocalyptic number.

561648742232766 is an abundant number, since it is smaller than the sum of its proper divisors (620769662468034).

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

561648742232766 is a wasteful number, since it uses less digits than its factorization.

561648742232766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4926743352943.

The product of its digits is 975421440, while the sum is 69.

The spelling of 561648742232766 in words is "five hundred sixty-one trillion, six hundred forty-eight billion, seven hundred forty-two million, two hundred thirty-two thousand, seven hundred sixty-six".