168916686372 has 72 divisors (see below), whose sum is σ = 488647804736. Its totient is φ = 48196016064.

The previous prime is 168916686371. The next prime is 168916686401. The reversal of 168916686372 is 273686619861.

It is a super-2 number, since 2×168916686372² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (168916686371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272518 + ... + 641949.

Almost surely, 2^168916686372 is an apocalyptic number.

168916686372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

168916686372 is an abundant number, since it is smaller than the sum of its proper divisors (319731118364).

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

168916686372 is a wasteful number, since it uses less digits than its factorization.

168916686372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915217 (or 915212 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 168916686372 in words is "one hundred sixty-eight billion, nine hundred sixteen million, six hundred eighty-six thousand, three hundred seventy-two".