31664846613 has 4 divisors (see below), whose sum is σ = 42219795488. Its totient is φ = 21109897740.

The previous prime is 31664846581. The next prime is 31664846623.

31664846613 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31664846613 - 2⁵ = 31664846581 is a prime.

It is a super-2 number, since 2×31664846613² (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 (31664846623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5277474433 + ... + 5277474438.

It is an arithmetic number, because the mean of its divisors is an integer number (10554948872).

Almost surely, 2^31664846613 is an apocalyptic number.

It is an amenable number.

31664846613 is a deficient number, since it is larger than the sum of its proper divisors (10554948875).

31664846613 is a wasteful number, since it uses less digits than its factorization.

31664846613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10554948874.

The product of its digits is 1492992, while the sum is 48.

The spelling of 31664846613 in words is "thirty-one billion, six hundred sixty-four million, eight hundred forty-six thousand, six hundred thirteen".