691316391936 has 136 divisors (see below), whose sum is σ = 1923660910080. Its totient is φ = 220418277376.

The previous prime is 691316391907. The next prime is 691316391967. The reversal of 691316391936 is 639193613196.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4445545 + ... + 4598423.

Almost surely, 2^691316391936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691316391936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (961830455040).

691316391936 is an abundant number, since it is smaller than the sum of its proper divisors (1232344518144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691316391936 is an equidigital number, since it uses as much as digits as its factorization.

691316391936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152937 (or 152907 counting only the distinct ones).

The product of its digits is 4251528, while the sum is 57.

The spelling of 691316391936 in words is "six hundred ninety-one billion, three hundred sixteen million, three hundred ninety-one thousand, nine hundred thirty-six".