31655664845 has 16 divisors (see below), whose sum is σ = 43819221888. Its totient is φ = 21503872320.

The previous prime is 31655664823. The next prime is 31655664847. The reversal of 31655664845 is 54846655613.

It is not a de Polignac number, because 31655664845 - 2¹⁰ = 31655663821 is a prime.

It is a super-2 number, since 2×31655664845² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31655664847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4222646 + ... + 4230135.

It is an arithmetic number, because the mean of its divisors is an integer number (2738701368).

Almost surely, 2^31655664845 is an apocalyptic number.

31655664845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31655664845 is a deficient number, since it is larger than the sum of its proper divisors (12163557043).

31655664845 is a wasteful number, since it uses less digits than its factorization.

31655664845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8452900.

The product of its digits is 10368000, while the sum is 53.

The spelling of 31655664845 in words is "thirty-one billion, six hundred fifty-five million, six hundred sixty-four thousand, eight hundred forty-five".