31643434613 has 16 divisors (see below), whose sum is σ = 38072931840. Its totient is φ = 25691612400.

The previous prime is 31643434463. The next prime is 31643434621.

31643434613 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 31643434613 - 2¹² = 31643430517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31643434213) 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, 1196018 + ... + 1222188.

It is an arithmetic number, because the mean of its divisors is an integer number (2379558240).

Almost surely, 2^31643434613 is an apocalyptic number.

It is an amenable number.

31643434613 is a deficient number, since it is larger than the sum of its proper divisors (6429497227).

31643434613 is a wasteful number, since it uses less digits than its factorization.

31643434613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35288.

The product of its digits is 186624, while the sum is 38.

The spelling of 31643434613 in words is "thirty-one billion, six hundred forty-three million, four hundred thirty-four thousand, six hundred thirteen".