165799062864 has 320 divisors, whose sum is σ = 493134151680. Its totient is φ = 53312878080.

The previous prime is 165799062841. The next prime is 165799062881. The reversal of 165799062864 is 468260997561.

165799062864 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 358097097 + ... + 358097559.

It is an arithmetic number, because the mean of its divisors is an integer number (1541044224).

Almost surely, 2^165799062864 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 165799062864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246567075840).

165799062864 is an abundant number, since it is smaller than the sum of its proper divisors (327335088816).

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

165799062864 is a wasteful number, since it uses less digits than its factorization.

165799062864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 165799062864 in words is "one hundred sixty-five billion, seven hundred ninety-nine million, sixty-two thousand, eight hundred sixty-four".