561601066650 has 48 divisors (see below), whose sum is σ = 1499906853984. Its totient is φ = 138240262080.

The previous prime is 561601066639. The next prime is 561601066703. The reversal of 561601066650 is 56660106165.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143998324 + ... + 144002223.

It is an arithmetic number, because the mean of its divisors is an integer number (31248059458).

Almost surely, 2^561601066650 is an apocalyptic number.

561601066650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561601066650 is an abundant number, since it is smaller than the sum of its proper divisors (938305787334).

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

561601066650 is a wasteful number, since it uses less digits than its factorization.

561601066650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288000575 (or 288000570 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 561601066650 in words is "five hundred sixty-one billion, six hundred one million, sixty-six thousand, six hundred fifty".