31621444412613 has 16 divisors (see below), whose sum is σ = 46748841817152. Its totient is φ = 18850339440000.

The previous prime is 31621444412603. The next prime is 31621444412641.

31621444412613 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31621444412613 - 2¹² = 31621444408517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31621444412603) 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, 7854306088 + ... + 7854310113.

It is an arithmetic number, because the mean of its divisors is an integer number (2921802613572).

Almost surely, 2^{31621444412613} is an apocalyptic number.

31621444412613 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31621444412613 is a deficient number, since it is larger than the sum of its proper divisors (15127397404539).

31621444412613 is a wasteful number, since it uses less digits than its factorization.

31621444412613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15708616276.

The product of its digits is 331776, while the sum is 42.

It can be divided in two parts, 3162144 and 4412613, that added together give a palindrome (7574757).

The spelling of 31621444412613 in words is "thirty-one trillion, six hundred twenty-one billion, four hundred forty-four million, four hundred twelve thousand, six hundred thirteen".