691752992494 has 16 divisors (see below), whose sum is σ = 1041491687328. Its totient is φ = 344589376032.

The previous prime is 691752992477. The next prime is 691752992527. The reversal of 691752992494 is 494299257196.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5266264 + ... + 5396020.

It is an arithmetic number, because the mean of its divisors is an integer number (65093230458).

Almost surely, 2^691752992494 is an apocalyptic number.

691752992494 is a deficient number, since it is larger than the sum of its proper divisors (349738694834).

691752992494 is a wasteful number, since it uses less digits than its factorization.

691752992494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139659.

The product of its digits is 88179840, while the sum is 67.

The spelling of 691752992494 in words is "six hundred ninety-one billion, seven hundred fifty-two million, nine hundred ninety-two thousand, four hundred ninety-four".