165631488000 has 416 divisors, whose sum is σ = 601320575232. Its totient is φ = 40148992000.

The previous prime is 165631487993. The next prime is 165631488049. The reversal of 165631488000 is 884136561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16891099 + ... + 16900901.

It is an arithmetic number, because the mean of its divisors is an integer number (1445482152).

Almost surely, 2^165631488000 is an apocalyptic number.

165631488000 is a gapful number since it is divisible by the number (10) 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 165631488000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300660287616).

165631488000 is an abundant number, since it is smaller than the sum of its proper divisors (435689087232).

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

165631488000 is an equidigital number, since it uses as much as digits as its factorization.

165631488000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9856 (or 9824 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 165631488000 in words is "one hundred sixty-five billion, six hundred thirty-one million, four hundred eighty-eight thousand".