165163252554 has 64 divisors (see below), whose sum is σ = 387816422400. Its totient is φ = 51958416816.

The previous prime is 165163252547. The next prime is 165163252589. The reversal of 165163252554 is 455252361561.

165163252554 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 632 + 5 + 2 + 5 + 5 + 4 = 666.

It is a Curzon 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, 36204 + ... + 575879.

It is an arithmetic number, because the mean of its divisors is an integer number (6059631600).

Almost surely, 2^165163252554 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165163252554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193908211200).

165163252554 is an abundant number, since it is smaller than the sum of its proper divisors (222653169846).

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

165163252554 is a wasteful number, since it uses less digits than its factorization.

165163252554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612376 (or 612370 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The spelling of 165163252554 in words is "one hundred sixty-five billion, one hundred sixty-three million, two hundred fifty-two thousand, five hundred fifty-four".