27971631898870 has 16 divisors (see below), whose sum is σ = 54926113547088. Its totient is φ = 10171502508640.

The previous prime is 27971631898829. The next prime is 27971631898897. The reversal of 27971631898870 is 7889813617972.

It is a congruent number.

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, 127143781249 + ... + 127143781468.

It is an arithmetic number, because the mean of its divisors is an integer number (3432882096693).

Almost surely, 2^{27971631898870} is an apocalyptic number.

27971631898870 is a deficient number, since it is larger than the sum of its proper divisors (26954481648218).

27971631898870 is a wasteful number, since it uses less digits than its factorization.

27971631898870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254287562735.

The product of its (nonzero) digits is 512096256, while the sum is 76.

The spelling of 27971631898870 in words is "twenty-seven trillion, nine hundred seventy-one billion, six hundred thirty-one million, eight hundred ninety-eight thousand, eight hundred seventy".