2165602112500 has 72 divisors (see below), whose sum is σ = 4739232607200. Its totient is φ = 865823700000.

The previous prime is 2165602112483. The next prime is 2165602112519. The reversal of 2165602112500 is 52112065612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26596851 + ... + 26678149.

It is an arithmetic number, because the mean of its divisors is an integer number (65822675100).

Almost surely, 2^{2165602112500} is an apocalyptic number.

2165602112500 is a gapful number since it is divisible by the number (20) 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 2165602112500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2369616303600).

2165602112500 is an abundant number, since it is smaller than the sum of its proper divisors (2573630494700).

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

2165602112500 is an equidigital number, since it uses as much as digits as its factorization.

2165602112500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83459 (or 83437 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 2165602112500 in words is "two trillion, one hundred sixty-five billion, six hundred two million, one hundred twelve thousand, five hundred".