31620044613 has 8 divisors (see below), whose sum is σ = 42303951648. Its totient is φ = 21008083664.

The previous prime is 31620044593. The next prime is 31620044623. The reversal of 31620044613 is 31644002613.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31620044613 - 2²¹ = 31617947461 is a prime.

It is a super-2 number, since 2×31620044613² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31620044623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17985495 + ... + 17987252.

It is an arithmetic number, because the mean of its divisors is an integer number (5287993956).

Almost surely, 2^31620044613 is an apocalyptic number.

It is an amenable number.

31620044613 is a deficient number, since it is larger than the sum of its proper divisors (10683907035).

31620044613 is a wasteful number, since it uses less digits than its factorization.

31620044613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35973043.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 31620044613 in words is "thirty-one billion, six hundred twenty million, forty-four thousand, six hundred thirteen".