691601902916 has 24 divisors (see below), whose sum is σ = 1215345417216. Its totient is φ = 344361093120.

The previous prime is 691601902897. The next prime is 691601902921. The reversal of 691601902916 is 619209106196.

It is a super-3 number, since 3×691601902916³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3741101 + ... + 3921611.

It is an arithmetic number, because the mean of its divisors is an integer number (50639392384).

Almost surely, 2^691601902916 is an apocalyptic number.

It is an amenable number.

691601902916 is a deficient number, since it is larger than the sum of its proper divisors (523743514300).

691601902916 is a wasteful number, since it uses less digits than its factorization.

691601902916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184499 (or 184497 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 50.

The spelling of 691601902916 in words is "six hundred ninety-one billion, six hundred one million, nine hundred two thousand, nine hundred sixteen".