168637245952 has 120 divisors (see below), whose sum is σ = 392511166740. Its totient is φ = 72170864640.

The previous prime is 168637245947. The next prime is 168637245971. The reversal of 168637245952 is 259542736861.

It can be written as a sum of positive squares in 2 ways, for example, as 160140830976 + 8496414976 = 400176^2 + 92176^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19288302 + ... + 19297042.

Almost surely, 2^168637245952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168637245952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196255583370).

168637245952 is an abundant number, since it is smaller than the sum of its proper divisors (223873920788).

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

168637245952 is an frugal number, since it uses more digits than its factorization.

168637245952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542 (or 9519 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 58.

The spelling of 168637245952 in words is "one hundred sixty-eight billion, six hundred thirty-seven million, two hundred forty-five thousand, nine hundred fifty-two".