168518700372 has 144 divisors (see below), whose sum is σ = 447921230400. Its totient is φ = 49215936000.

The previous prime is 168518700313. The next prime is 168518700373. The reversal of 168518700372 is 273007815861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168518700373) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25303579 + ... + 25310237.

It is an arithmetic number, because the mean of its divisors is an integer number (3110564100).

Almost surely, 2^168518700372 is an apocalyptic number.

168518700372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168518700372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223960615200).

168518700372 is an abundant number, since it is smaller than the sum of its proper divisors (279402530028).

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

168518700372 is a wasteful number, since it uses less digits than its factorization.

168518700372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7318 (or 7305 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 168518700372 in words is "one hundred sixty-eight billion, five hundred eighteen million, seven hundred thousand, three hundred seventy-two".