688448994564 has 24 divisors (see below), whose sum is σ = 1606521934080. Its totient is φ = 229462862944.

The previous prime is 688448994553. The next prime is 688448994581. The reversal of 688448994564 is 465499844886.

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, 2374119 + ... + 2648270.

It is an arithmetic number, because the mean of its divisors is an integer number (66938413920).

Almost surely, 2^688448994564 is an apocalyptic number.

It is an amenable number.

688448994564 is an abundant number, since it is smaller than the sum of its proper divisors (918072939516).

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

688448994564 is a wasteful number, since it uses less digits than its factorization.

688448994564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5033819 (or 5033817 counting only the distinct ones).

The product of its digits is 1911029760, while the sum is 75.

The spelling of 688448994564 in words is "six hundred eighty-eight billion, four hundred forty-eight million, nine hundred ninety-four thousand, five hundred sixty-four".