27815972898 has 32 divisors (see below), whose sum is σ = 66343689216. Its totient is φ = 7601880528.

The previous prime is 27815972897. The next prime is 27815972903. The reversal of 27815972898 is 89827951872.

It is not an unprimeable number, because it can be changed into a prime (27815972897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14396536 + ... + 14398467.

It is an arithmetic number, because the mean of its divisors is an integer number (2073240288).

Almost surely, 2^27815972898 is an apocalyptic number.

27815972898 is an abundant number, since it is smaller than the sum of its proper divisors (38527716318).

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

27815972898 is a wasteful number, since it uses less digits than its factorization.

27815972898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28795038.

The product of its digits is 40642560, while the sum is 66.

The spelling of 27815972898 in words is "twenty-seven billion, eight hundred fifteen million, nine hundred seventy-two thousand, eight hundred ninety-eight".