643051015113 has 16 divisors (see below), whose sum is σ = 940777104960. Its totient is φ = 388257215424.

The previous prime is 643051015109. The next prime is 643051015129. The reversal of 643051015113 is 311510150346.

It is not a de Polignac number, because 643051015113 - 2² = 643051015109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (643051015133) 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, 155549703 + ... + 155553836.

It is an arithmetic number, because the mean of its divisors is an integer number (58798569060).

Almost surely, 2^643051015113 is an apocalyptic number.

It is an amenable number.

643051015113 is a deficient number, since it is larger than the sum of its proper divisors (297726089847).

643051015113 is a wasteful number, since it uses less digits than its factorization.

643051015113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311103608.

The product of its (nonzero) digits is 5400, while the sum is 30.

Adding to 643051015113 its reverse (311510150346), we get a palindrome (954561165459).

The spelling of 643051015113 in words is "six hundred forty-three billion, fifty-one million, fifteen thousand, one hundred thirteen".