165012501264 has 80 divisors (see below), whose sum is σ = 459547712064. Its totient is φ = 50720601600.

The previous prime is 165012501239. The next prime is 165012501307. The reversal of 165012501264 is 462105210561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469734 + ... + 742074.

Almost surely, 2^165012501264 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 165012501264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229773856032).

165012501264 is an abundant number, since it is smaller than the sum of its proper divisors (294535210800).

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

165012501264 is a wasteful number, since it uses less digits than its factorization.

165012501264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273336 (or 273330 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 165012501264 in words is "one hundred sixty-five billion, twelve million, five hundred one thousand, two hundred sixty-four".