31641611645 has 32 divisors (see below), whose sum is σ = 44262286080. Its totient is φ = 21265597440.

The previous prime is 31641611633. The next prime is 31641611663. The reversal of 31641611645 is 54611614613.

It is not a de Polignac number, because 31641611645 - 2⁴ = 31641611629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31641611599 and 31641611608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 578021 + ... + 630389.

It is an arithmetic number, because the mean of its divisors is an integer number (1383196440).

Almost surely, 2^31641611645 is an apocalyptic number.

31641611645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31641611645 is a deficient number, since it is larger than the sum of its proper divisors (12620674435).

31641611645 is a wasteful number, since it uses less digits than its factorization.

31641611645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52725.

The product of its digits is 51840, while the sum is 38.

The spelling of 31641611645 in words is "thirty-one billion, six hundred forty-one million, six hundred eleven thousand, six hundred forty-five".