643057048613 has 16 divisors (see below), whose sum is σ = 756929404800. Its totient is φ = 546040399968.

The previous prime is 643057048609. The next prime is 643057048679. The reversal of 643057048613 is 316840750346.

It is not a de Polignac number, because 643057048613 - 2² = 643057048609 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 (643057048603) 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, 8724056 + ... + 8797457.

It is an arithmetic number, because the mean of its divisors is an integer number (47308087800).

Almost surely, 2^643057048613 is an apocalyptic number.

It is an amenable number.

643057048613 is a deficient number, since it is larger than the sum of its proper divisors (113872356187).

643057048613 is a wasteful number, since it uses less digits than its factorization.

643057048613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17521641 (or 17521627 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 47.

Adding to 643057048613 its reverse (316840750346), we get a palindrome (959897798959).

The spelling of 643057048613 in words is "six hundred forty-three billion, fifty-seven million, forty-eight thousand, six hundred thirteen".