31612181085 has 12 divisors (see below), whose sum is σ = 54794447292. Its totient is φ = 16859829888.

The previous prime is 31612181063. The next prime is 31612181123. The reversal of 31612181085 is 58018121613.

31612181085 is a `hidden beast` number, since 31 + 612 + 1 + 8 + 1 + 0 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18369465156 + 13242715929 = 135534^2 + 115077^2 .

It is not a de Polignac number, because 31612181085 - 2⁵ = 31612181053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351246412 + ... + 351246501.

It is an arithmetic number, because the mean of its divisors is an integer number (4566203941).

Almost surely, 2^31612181085 is an apocalyptic number.

It is an amenable number.

31612181085 is a deficient number, since it is larger than the sum of its proper divisors (23182266207).

31612181085 is a wasteful number, since it uses less digits than its factorization.

31612181085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702492924 (or 702492921 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 31612181085 in words is "thirty-one billion, six hundred twelve million, one hundred eighty-one thousand, eighty-five".