639267812913 has 8 divisors (see below), whose sum is σ = 857786110528. Its totient is φ = 423464028624.

The previous prime is 639267812903. The next prime is 639267812917. The reversal of 639267812913 is 319218762936.

639267812913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 639267812913 - 2⁸ = 639267812657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639267812917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678627781 + ... + 678628722.

It is an arithmetic number, because the mean of its divisors is an integer number (107223263816).

Almost surely, 2^639267812913 is an apocalyptic number.

It is an amenable number.

639267812913 is a deficient number, since it is larger than the sum of its proper divisors (218518297615).

639267812913 is a wasteful number, since it uses less digits than its factorization.

639267812913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357256663.

The product of its digits is 5878656, while the sum is 57.

The spelling of 639267812913 in words is "six hundred thirty-nine billion, two hundred sixty-seven million, eight hundred twelve thousand, nine hundred thirteen".