2165996260332 has 120 divisors (see below), whose sum is σ = 5675201532000. Its totient is φ = 720360635904.

The previous prime is 2165996260319. The next prime is 2165996260333. The reversal of 2165996260332 is 2330626995612.

It is a happy number.

2165996260332 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 9 + 9 + 626 + 0 + 3 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2165996260333) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 599498958 + ... + 599502570.

It is an arithmetic number, because the mean of its divisors is an integer number (47293346100).

Almost surely, 2^{2165996260332} 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 2165996260332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2837600766000).

2165996260332 is an abundant number, since it is smaller than the sum of its proper divisors (3509205271668).

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

2165996260332 is a wasteful number, since it uses less digits than its factorization.

2165996260332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7317 (or 7306 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 54.

The spelling of 2165996260332 in words is "two trillion, one hundred sixty-five billion, nine hundred ninety-six million, two hundred sixty thousand, three hundred thirty-two".