168506515632 has 160 divisors (see below), whose sum is σ = 537852575232. Its totient is φ = 44268060672.

The previous prime is 168506515631. The next prime is 168506515637. The reversal of 168506515632 is 236515605861.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (168506515631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1047523 + ... + 1197629.

Almost surely, 2^168506515632 is an apocalyptic number.

168506515632 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 168506515632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268926287616).

168506515632 is an abundant number, since it is smaller than the sum of its proper divisors (369346059600).

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

168506515632 is a wasteful number, since it uses less digits than its factorization.

168506515632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150395 (or 150389 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 168506515632 in words is "one hundred sixty-eight billion, five hundred six million, five hundred fifteen thousand, six hundred thirty-two".