2645345644 has 12 divisors (see below), whose sum is σ = 4830631344. Its totient is φ = 1265165264.

The previous prime is 2645345617. The next prime is 2645345671. The reversal of 2645345644 is 4465435462.

It is an interprime number because it is at equal distance from previous prime (2645345617) and next prime (2645345671).

It is a self number, because there is not a number n which added to its sum of digits gives 2645345644.

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 3 ways as a sum of consecutive naturals, for example, 14376787 + ... + 14376970.

It is an arithmetic number, because the mean of its divisors is an integer number (402552612).

Almost surely, 2^2645345644 is an apocalyptic number.

It is an amenable number.

2645345644 is a deficient number, since it is larger than the sum of its proper divisors (2185285700).

2645345644 is a wasteful number, since it uses less digits than its factorization.

2645345644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28753784 (or 28753782 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 43.

The square root of 2645345644 is about 51432.9237356773. The cubic root of 2645345644 is about 1383.0168620932.

The spelling of 2645345644 in words is "two billion, six hundred forty-five million, three hundred forty-five thousand, six hundred forty-four".