691472076304 has 45 divisors (see below), whose sum is σ = 1345623896973. Its totient is φ = 344220957696.

The previous prime is 691472076181. The next prime is 691472076311. The reversal of 691472076304 is 403670274196.

The square root of 691472076304 is 831548.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 422567602704 + 268904473600 = 650052^2 + 518560^2 .

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 1493459977 + ... + 1493460439.

Almost surely, 2^691472076304 is an apocalyptic number.

691472076304 is the 831548-th square number.

It is an amenable number.

691472076304 is a deficient number, since it is larger than the sum of its proper divisors (654151820669).

691472076304 is an frugal number, since it uses more digits than its factorization.

691472076304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832 (or 914 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 49.

Multiplying 691472076304 by its sum of digits (49), we get a square (33882131738896 = 5820836²).

The spelling of 691472076304 in words is "six hundred ninety-one billion, four hundred seventy-two million, seventy-six thousand, three hundred four".