691013836799 has 48 divisors (see below), whose sum is σ = 843235329024. Its totient is φ = 560751609600.

The previous prime is 691013836769. The next prime is 691013836817. The reversal of 691013836799 is 997638310196.

It is not a de Polignac number, because 691013836799 - 2²⁸ = 690745401343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691013836729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96063947 + ... + 96071139.

It is an arithmetic number, because the mean of its divisors is an integer number (17567402688).

Almost surely, 2^691013836799 is an apocalyptic number.

691013836799 is a deficient number, since it is larger than the sum of its proper divisors (152221492225).

691013836799 is a wasteful number, since it uses less digits than its factorization.

691013836799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8928 (or 8915 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 62.

The spelling of 691013836799 in words is "six hundred ninety-one billion, thirteen million, eight hundred thirty-six thousand, seven hundred ninety-nine".