691329382994 has 8 divisors (see below), whose sum is σ = 1036997767548. Its totient is φ = 345663460480.

The previous prime is 691329382963. The next prime is 691329383039. The reversal of 691329382994 is 499283923196.

It can be written as a sum of positive squares in 2 ways, for example, as 672687030625 + 18642352369 = 820175^2 + 136537^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 691329382994.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 467834 + ... + 1265514.

Almost surely, 2^691329382994 is an apocalyptic number.

691329382994 is a deficient number, since it is larger than the sum of its proper divisors (345668384554).

691329382994 is a wasteful number, since it uses less digits than its factorization.

691329382994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231020.

The product of its digits is 45349632, while the sum is 65.

The spelling of 691329382994 in words is "six hundred ninety-one billion, three hundred twenty-nine million, three hundred eighty-two thousand, nine hundred ninety-four".