813639965039 has 8 divisors (see below), whose sum is σ = 894086121168. Its totient is φ = 734273623360.

The previous prime is 813639965029. The next prime is 813639965041. The reversal of 813639965039 is 930569936318.

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

It is a cyclic number.

It is not a de Polignac number, because 813639965039 - 2⁴ = 813639965023 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 (813639965029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269952032 + ... + 269955045.

It is an arithmetic number, because the mean of its divisors is an integer number (111760765146).

Almost surely, 2^813639965039 is an apocalyptic number.

813639965039 is a deficient number, since it is larger than the sum of its proper divisors (80446156129).

813639965039 is a wasteful number, since it uses less digits than its factorization.

813639965039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539907225.

The product of its (nonzero) digits is 28343520, while the sum is 62.

The spelling of 813639965039 in words is "eight hundred thirteen billion, six hundred thirty-nine million, nine hundred sixty-five thousand, thirty-nine".