2645858965 has 16 divisors (see below), whose sum is σ = 3360830400. Its totient is φ = 1994067072.

The previous prime is 2645858933. The next prime is 2645859001. The reversal of 2645858965 is 5698585462.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2645858965 - 2⁵ = 2645858933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60792 + ... + 94801.

It is an arithmetic number, because the mean of its divisors is an integer number (210051900).

Almost surely, 2^2645858965 is an apocalyptic number.

It is an amenable number.

2645858965 is a deficient number, since it is larger than the sum of its proper divisors (714971435).

2645858965 is a wasteful number, since it uses less digits than its factorization.

2645858965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155796.

The product of its digits is 20736000, while the sum is 58.

The square root of 2645858965 is about 51437.9136921396. The cubic root of 2645858965 is about 1383.1063129979.

The spelling of 2645858965 in words is "two billion, six hundred forty-five million, eight hundred fifty-eight thousand, nine hundred sixty-five".