15550566560 has 24 divisors (see below), whose sum is σ = 36738213876. Its totient is φ = 6220226560.

The previous prime is 15550566533. The next prime is 15550566583. The reversal of 15550566560 is 6566505551.

It can be written as a sum of positive squares in 2 ways, for example, as 14719512976 + 831053584 = 121324^2 + 28828^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48595361 + ... + 48595680.

Almost surely, 2^15550566560 is an apocalyptic number.

15550566560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15550566560 is an abundant number, since it is smaller than the sum of its proper divisors (21187647316).

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

15550566560 is an equidigital number, since it uses as much as digits as its factorization.

15550566560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97191056 (or 97191048 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 15550566560 in words is "fifteen billion, five hundred fifty million, five hundred sixty-six thousand, five hundred sixty".