13031507643 has 16 divisors (see below), whose sum is σ = 21662766336. Its totient is φ = 6769614240.

The previous prime is 13031507623. The next prime is 13031507677. The reversal of 13031507643 is 34670513031.

13031507643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13031507643 - 2⁵ = 13031507611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (13031507623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28206496 + ... + 28206957.

It is an arithmetic number, because the mean of its divisors is an integer number (1353922896).

Almost surely, 2^13031507643 is an apocalyptic number.

13031507643 is a deficient number, since it is larger than the sum of its proper divisors (8631258693).

13031507643 is a wasteful number, since it uses less digits than its factorization.

13031507643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56413474.

The product of its (nonzero) digits is 22680, while the sum is 33.

The spelling of 13031507643 in words is "thirteen billion, thirty-one million, five hundred seven thousand, six hundred forty-three".