168645208680 has 128 divisors (see below), whose sum is σ = 605393107200. Its totient is φ = 41512663296.

The previous prime is 168645208661. The next prime is 168645208759. The reversal of 168645208680 is 86802546861.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5991844 + ... + 6019923.

It is an arithmetic number, because the mean of its divisors is an integer number (4729633650).

Almost surely, 2^168645208680 is an apocalyptic number.

168645208680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168645208680 is an abundant number, since it is smaller than the sum of its proper divisors (436747898520).

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

168645208680 is a wasteful number, since it uses less digits than its factorization.

168645208680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12011800 (or 12011790 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 168645208680 in words is "one hundred sixty-eight billion, six hundred forty-five million, two hundred eight thousand, six hundred eighty".