2165260625613 has 24 divisors (see below), whose sum is σ = 3351786142848. Its totient is φ = 1343428444512.

The previous prime is 2165260625603. The next prime is 2165260625623. The reversal of 2165260625613 is 3165260625612.

2165260625613 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 2 + 6 + 0 + 6 + 25 + 613 = 666.

It is an interprime number because it is at equal distance from previous prime (2165260625603) and next prime (2165260625623).

It is not a de Polignac number, because 2165260625613 - 2²² = 2165256431309 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165260625603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141346345 + ... + 141361662.

It is an arithmetic number, because the mean of its divisors is an integer number (139657755952).

Almost surely, 2^{2165260625613} is an apocalyptic number.

2165260625613 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2165260625613 is a deficient number, since it is larger than the sum of its proper divisors (1186525517235).

2165260625613 is a wasteful number, since it uses less digits than its factorization.

2165260625613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282708073 (or 282708070 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

Subtracting 2165260625613 from its reverse (3165260625612), we obtain a palindrome (999999999999).

The spelling of 2165260625613 in words is "two trillion, one hundred sixty-five billion, two hundred sixty million, six hundred twenty-five thousand, six hundred thirteen".