68497864856 has 32 divisors (see below), whose sum is σ = 136000782000. Its totient is φ = 32231356416.

The previous prime is 68497864807. The next prime is 68497864901. The reversal of 68497864856 is 65846879486.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 68497864856.

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, 2473535 + ... + 2501073.

Almost surely, 2^68497864856 is an apocalyptic number.

It is an amenable number.

68497864856 is a deficient number, since it is larger than the sum of its proper divisors (67502917144).

68497864856 is a wasteful number, since it uses less digits than its factorization.

68497864856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45851 (or 45847 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 71.

The spelling of 68497864856 in words is "sixty-eight billion, four hundred ninety-seven million, eight hundred sixty-four thousand, eight hundred fifty-six".