997699865600 has 66 divisors (see below), whose sum is σ = 2473087577964. Its totient is φ = 399079936000.

The previous prime is 997699865581. The next prime is 997699865719. The reversal of 997699865600 is 6568996799.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19460726 + ... + 19511925.

Almost surely, 2^997699865600 is an apocalyptic number.

It is an amenable number.

997699865600 is an abundant number, since it is smaller than the sum of its proper divisors (1475387712364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997699865600 is a wasteful number, since it uses less digits than its factorization.

997699865600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38972681 (or 38972658 counting only the distinct ones).

The product of its (nonzero) digits is 396809280, while the sum is 74.

The spelling of 997699865600 in words is "nine hundred ninety-seven billion, six hundred ninety-nine million, eight hundred sixty-five thousand, six hundred".