2160261665225 has 6 divisors (see below), whose sum is σ = 2678724464910. Its totient is φ = 1728209332160.

The previous prime is 2160261665203. The next prime is 2160261665299. The reversal of 2160261665225 is 5225661620612.

It can be written as a sum of positive squares in 3 ways, for example, as 98131201081 + 2062130464144 = 313259^2 + 1436012^2 .

It is not a de Polignac number, because 2160261665225 - 2⁶ = 2160261665161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43205233280 + ... + 43205233329.

It is an arithmetic number, because the mean of its divisors is an integer number (446454077485).

Almost surely, 2^{2160261665225} is an apocalyptic number.

2160261665225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2160261665225 is a deficient number, since it is larger than the sum of its proper divisors (518462799685).

2160261665225 is an equidigital number, since it uses as much as digits as its factorization.

2160261665225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86410466619 (or 86410466614 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 2160261665225 in words is "two trillion, one hundred sixty billion, two hundred sixty-one million, six hundred sixty-five thousand, two hundred twenty-five".