31621412405 has 16 divisors (see below), whose sum is σ = 41427811584. Its totient is φ = 22979330880.

The previous prime is 31621412363. The next prime is 31621412413. The reversal of 31621412405 is 50421412613.

It is a de Polignac number, because none of the positive numbers 2^k-31621412405 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 154877 + ... + 295346.

It is an arithmetic number, because the mean of its divisors is an integer number (2589238224).

Almost surely, 2^31621412405 is an apocalyptic number.

It is an amenable number.

31621412405 is a deficient number, since it is larger than the sum of its proper divisors (9806399179).

31621412405 is a wasteful number, since it uses less digits than its factorization.

31621412405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451516.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 31621412405 in words is "thirty-one billion, six hundred twenty-one million, four hundred twelve thousand, four hundred five".