31662626613 has 4 divisors (see below), whose sum is σ = 42216835488. Its totient is φ = 21108417740.

The previous prime is 31662626591. The next prime is 31662626623.

It is a happy number.

31662626613 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 a cyclic number.

It is not a de Polignac number, because 31662626613 - 2¹⁸ = 31662364469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31662626623) 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, 5277104433 + ... + 5277104438.

It is an arithmetic number, because the mean of its divisors is an integer number (10554208872).

Almost surely, 2^31662626613 is an apocalyptic number.

It is an amenable number.

31662626613 is a deficient number, since it is larger than the sum of its proper divisors (10554208875).

31662626613 is a wasteful number, since it uses less digits than its factorization.

31662626613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10554208874.

The product of its digits is 279936, while the sum is 42.

The spelling of 31662626613 in words is "thirty-one billion, six hundred sixty-two million, six hundred twenty-six thousand, six hundred thirteen".