27897915560 has 32 divisors (see below), whose sum is σ = 64795161600. Its totient is φ = 10799192640.

The previous prime is 27897915559. The next prime is 27897915587. The reversal of 27897915560 is 6551979872.

It is a super-2 number, since 2×27897915560² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27897915560.

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, 11247920 + ... + 11250399.

It is an arithmetic number, because the mean of its divisors is an integer number (2024848800).

Almost surely, 2^27897915560 is an apocalyptic number.

27897915560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27897915560 is an abundant number, since it is smaller than the sum of its proper divisors (36897246040).

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

27897915560 is a wasteful number, since it uses less digits than its factorization.

27897915560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22498361 (or 22498357 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 59.

The spelling of 27897915560 in words is "twenty-seven billion, eight hundred ninety-seven million, nine hundred fifteen thousand, five hundred sixty".