561615660050 has 36 divisors (see below), whose sum is σ = 1102478023386. Its totient is φ = 212822769600.

The previous prime is 561615660017. The next prime is 561615660077. The reversal of 561615660050 is 50066516165.

It can be written as a sum of positive squares in 3 ways, for example, as 541141198129 + 20474461921 = 735623^2 + 143089^2 .

It is a super-2 number, since 2×561615660050² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15539171 + ... + 15575270.

Almost surely, 2^561615660050 is an apocalyptic number.

561615660050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561615660050 is a deficient number, since it is larger than the sum of its proper divisors (540862363336).

561615660050 is a wasteful number, since it uses less digits than its factorization.

561615660050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31114491 (or 31114467 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 561615660050 in words is "five hundred sixty-one billion, six hundred fifteen million, six hundred sixty thousand, fifty".