691281253112 has 16 divisors (see below), whose sum is σ = 1364370894600. Its totient is φ = 327449014560.

The previous prime is 691281253109. The next prime is 691281253127. The reversal of 691281253112 is 211352182196.

691281253112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 691281253112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2273951339 + ... + 2273951642.

Almost surely, 2^691281253112 is an apocalyptic number.

It is an amenable number.

691281253112 is a deficient number, since it is larger than the sum of its proper divisors (673089641488).

691281253112 is a wasteful number, since it uses less digits than its factorization.

691281253112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547903006 (or 4547903002 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The spelling of 691281253112 in words is "six hundred ninety-one billion, two hundred eighty-one million, two hundred fifty-three thousand, one hundred twelve".