27800715560 has 32 divisors (see below), whose sum is σ = 63408488040. Its totient is φ = 10967952384.

The previous prime is 27800715539. The next prime is 27800715577. The reversal of 27800715560 is 6551700872.

It can be written as a sum of positive squares in 4 ways, for example, as 22310201956 + 5490513604 = 149366^2 + 74098^2 .

It is a super-2 number, since 2×27800715560² (a number of 22 digits) contains 22 as substring.

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, 4757477 + ... + 4763316.

Almost surely, 2^27800715560 is an apocalyptic number.

27800715560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27800715560 is an abundant number, since it is smaller than the sum of its proper divisors (35607772480).

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

27800715560 is a wasteful number, since it uses less digits than its factorization.

27800715560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520877 (or 9520873 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 41.

The spelling of 27800715560 in words is "twenty-seven billion, eight hundred million, seven hundred fifteen thousand, five hundred sixty".