561766046715540 has 72 divisors (see below), whose sum is σ = 1793709131628960. Its totient is φ = 141919843379904.

The previous prime is 561766046715499. The next prime is 561766046715547. The reversal of 561766046715540 is 45517640667165.

561766046715540 is a `hidden beast` number, since 5 + 6 + 1 + 7 + 6 + 6 + 0 + 4 + 6 + 71 + 554 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561766046715547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82129535574 + ... + 82129542413.

It is an arithmetic number, because the mean of its divisors is an integer number (24912626828180).

Almost surely, 2^{561766046715540} is an apocalyptic number.

It is an amenable number.

561766046715540 is an abundant number, since it is smaller than the sum of its proper divisors (1231943084913420).

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

561766046715540 is a wasteful number, since it uses less digits than its factorization.

561766046715540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164259078021 (or 164259078016 counting only the distinct ones).

The product of its (nonzero) digits is 127008000, while the sum is 63.

The spelling of 561766046715540 in words is "five hundred sixty-one trillion, seven hundred sixty-six billion, forty-six million, seven hundred fifteen thousand, five hundred forty".