27931171086885 has 48 divisors (see below), whose sum is σ = 49608283374720. Its totient is φ = 13408302864000.

The previous prime is 27931171086883. The next prime is 27931171086899. The reversal of 27931171086885 is 58868017113972.

It is not a de Polignac number, because 27931171086885 - 2¹ = 27931171086883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27931171086881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76000225 + ... + 76366854.

It is an arithmetic number, because the mean of its divisors is an integer number (1033505903640).

Almost surely, 2^{27931171086885} is an apocalyptic number.

It is an amenable number.

27931171086885 is a deficient number, since it is larger than the sum of its proper divisors (21677112287835).

27931171086885 is a wasteful number, since it uses less digits than its factorization.

27931171086885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152367210 (or 152367199 counting only the distinct ones).

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

The spelling of 27931171086885 in words is "twenty-seven trillion, nine hundred thirty-one billion, one hundred seventy-one million, eighty-six thousand, eight hundred eighty-five".