168617100072 has 64 divisors (see below), whose sum is σ = 444141434880. Its totient is φ = 53239995072.

The previous prime is 168617100037. The next prime is 168617100101. The reversal of 168617100072 is 270001716861.

It is a self number, because there is not a number n which added to its sum of digits gives 168617100072.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1425988 + ... + 1539699.

It is an arithmetic number, because the mean of its divisors is an integer number (6939709920).

Almost surely, 2^168617100072 is an apocalyptic number.

168617100072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

168617100072 is an abundant number, since it is smaller than the sum of its proper divisors (275524334808).

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

168617100072 is a wasteful number, since it uses less digits than its factorization.

168617100072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2965822 (or 2965818 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 39.

The spelling of 168617100072 in words is "one hundred sixty-eight billion, six hundred seventeen million, one hundred thousand, seventy-two".