2645968779 has 24 divisors (see below), whose sum is σ = 3850150512. Its totient is φ = 1751016960.

The previous prime is 2645968777. The next prime is 2645968781. The reversal of 2645968779 is 9778695462.

It is an interprime number because it is at equal distance from previous prime (2645968777) and next prime (2645968781).

It is not a de Polignac number, because 2645968779 - 2¹ = 2645968777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2645968771) 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, 713859 + ... + 717555.

It is an arithmetic number, because the mean of its divisors is an integer number (160422938).

Almost surely, 2^2645968779 is an apocalyptic number.

2645968779 is a deficient number, since it is larger than the sum of its proper divisors (1204181733).

2645968779 is a wasteful number, since it uses less digits than its factorization.

2645968779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4267 (or 4264 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The square root of 2645968779 is about 51438.9811232688. The cubic root of 2645968779 is about 1383.1254475949.

The spelling of 2645968779 in words is "two billion, six hundred forty-five million, nine hundred sixty-eight thousand, seven hundred seventy-nine".