2645185121 has 2 divisors, whose sum is σ = 2645185122. Its totient is φ = 2645185120.

The previous prime is 2645185097. The next prime is 2645185133. The reversal of 2645185121 is 1215815462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2399040400 + 246144721 = 48980^2 + 15689^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645185121 - 2²⁶ = 2578076257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2645185171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322592560 + 1322592561.

It is an arithmetic number, because the mean of its divisors is an integer number (1322592561).

Almost surely, 2^2645185121 is an apocalyptic number.

It is an amenable number.

2645185121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645185121 is an equidigital number, since it uses as much as digits as its factorization.

2645185121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 35.

The square root of 2645185121 is about 51431.3632037884. The cubic root of 2645185121 is about 1382.9888871091.

The spelling of 2645185121 in words is "two billion, six hundred forty-five million, one hundred eighty-five thousand, one hundred twenty-one".