691000819312 has 40 divisors (see below), whose sum is σ = 1344592690560. Its totient is φ = 344010072000.

The previous prime is 691000819219. The next prime is 691000819321. The reversal of 691000819312 is 213918000196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12836389 + ... + 12890107.

It is an arithmetic number, because the mean of its divisors is an integer number (33614817264).

Almost surely, 2^691000819312 is an apocalyptic number.

It is an amenable number.

691000819312 is a deficient number, since it is larger than the sum of its proper divisors (653591871248).

691000819312 is a wasteful number, since it uses less digits than its factorization.

691000819312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57181 (or 57175 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 691000819312 in words is "six hundred ninety-one billion, eight hundred nineteen thousand, three hundred twelve".