691498686096 has 75 divisors (see below), whose sum is σ = 2001484465651. Its totient is φ = 230489583264.

The previous prime is 691498686089. The next prime is 691498686143. The reversal of 691498686096 is 690686894196.

The square root of 691498686096 is 831564.

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

691498686096 is a `hidden beast` number, since 6 + 9 + 1 + 4 + 9 + 8 + 6 + 8 + 609 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 29924755 + ... + 29947853.

Almost surely, 2^691498686096 is an apocalyptic number.

691498686096 is the 831564-th square number.

It is an amenable number.

691498686096 is an abundant number, since it is smaller than the sum of its proper divisors (1309985779555).

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

691498686096 is an frugal number, since it uses more digits than its factorization.

691498686096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46218 (or 23104 counting only the distinct ones).

The product of its (nonzero) digits is 241864704, while the sum is 72.

The spelling of 691498686096 in words is "six hundred ninety-one billion, four hundred ninety-eight million, six hundred eighty-six thousand, ninety-six".