31647040105 has 16 divisors (see below), whose sum is σ = 39304069200. Its totient is φ = 24433355520.

The previous prime is 31647040069. The next prime is 31647040123. The reversal of 31647040105 is 50104074613.

It can be written as a sum of positive squares in 8 ways, for example, as 3169802601 + 28477237504 = 56301^2 + 168752^2 .

It is not a de Polignac number, because 31647040105 - 2²⁹ = 31110169193 is a prime.

It is a super-2 number, since 2×31647040105² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 272911 + ... + 371179.

It is an arithmetic number, because the mean of its divisors is an integer number (2456504325).

Almost surely, 2^31647040105 is an apocalyptic number.

It is an amenable number.

31647040105 is a deficient number, since it is larger than the sum of its proper divisors (7657029095).

31647040105 is a wasteful number, since it uses less digits than its factorization.

31647040105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100524.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 31647040105 in words is "thirty-one billion, six hundred forty-seven million, forty thousand, one hundred five".