2165163653 has 2 divisors, whose sum is σ = 2165163654. Its totient is φ = 2165163652.

The previous prime is 2165163619. The next prime is 2165163661. The reversal of 2165163653 is 3563615612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1987554724 + 177608929 = 44582^2 + 13327^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165163653 - 2²⁰ = 2164115077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165163613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082581826 + 1082581827.

It is an arithmetic number, because the mean of its divisors is an integer number (1082581827).

Almost surely, 2^2165163653 is an apocalyptic number.

It is an amenable number.

2165163653 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165163653 is an equidigital number, since it uses as much as digits as its factorization.

2165163653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 38.

The square root of 2165163653 is about 46531.3190550193. The cubic root of 2165163653 is about 1293.6900640223.

The spelling of 2165163653 in words is "two billion, one hundred sixty-five million, one hundred sixty-three thousand, six hundred fifty-three".