31643136085 has 32 divisors (see below), whose sum is σ = 43721377920. Its totient is φ = 21743251200.

The previous prime is 31643136053. The next prime is 31643136103. The reversal of 31643136085 is 58063134613.

It is not a de Polignac number, because 31643136085 - 2⁵ = 31643136053 is a prime.

It is a super-2 number, since 2×31643136085² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349195 + ... + 430375.

It is an arithmetic number, because the mean of its divisors is an integer number (1366293060).

Almost surely, 2^31643136085 is an apocalyptic number.

It is an amenable number.

31643136085 is a deficient number, since it is larger than the sum of its proper divisors (12078241835).

31643136085 is a wasteful number, since it uses less digits than its factorization.

31643136085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81589.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 31643136085 in words is "thirty-one billion, six hundred forty-three million, one hundred thirty-six thousand, eighty-five".