165215876280 has 256 divisors, whose sum is σ = 612289843200. Its totient is φ = 34729482240.

The previous prime is 165215876257. The next prime is 165215876281. The reversal of 165215876280 is 82678512561.

165215876280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165215876281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2931406 + ... + 2987234.

It is an arithmetic number, because the mean of its divisors is an integer number (2391757200).

Almost surely, 2^165215876280 is an apocalyptic number.

165215876280 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 165215876280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306144921600).

165215876280 is an abundant number, since it is smaller than the sum of its proper divisors (447073966920).

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

165215876280 is a wasteful number, since it uses less digits than its factorization.

165215876280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56134 (or 56130 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 165215876280 in words is "one hundred sixty-five billion, two hundred fifteen million, eight hundred seventy-six thousand, two hundred eighty".