639155563913 has 8 divisors (see below), whose sum is σ = 643814186400. Its totient is φ = 634497804288.

The previous prime is 639155563903. The next prime is 639155563967. The reversal of 639155563913 is 319365551936.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-639155563913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639155563903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310345 + ... + 1730697.

It is an arithmetic number, because the mean of its divisors is an integer number (80476773300).

Almost surely, 2^639155563913 is an apocalyptic number.

It is an amenable number.

639155563913 is a deficient number, since it is larger than the sum of its proper divisors (4658622487).

639155563913 is a wasteful number, since it uses less digits than its factorization.

639155563913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431431.

The product of its digits is 9841500, while the sum is 56.

The spelling of 639155563913 in words is "six hundred thirty-nine billion, one hundred fifty-five million, five hundred sixty-three thousand, nine hundred thirteen".