2640366645 has 32 divisors (see below), whose sum is σ = 5112108288. Its totient is φ = 1136022528.

The previous prime is 2640366637. The next prime is 2640366653. The reversal of 2640366645 is 5466630462.

It is an interprime number because it is at equal distance from previous prime (2640366637) and next prime (2640366653).

It is not a de Polignac number, because 2640366645 - 2³ = 2640366637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2640366597 and 2640366606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737814 + ... + 741383.

It is an arithmetic number, because the mean of its divisors is an integer number (159753384).

Almost surely, 2^2640366645 is an apocalyptic number.

It is an amenable number.

2640366645 is a deficient number, since it is larger than the sum of its proper divisors (2471741643).

2640366645 is a wasteful number, since it uses less digits than its factorization.

2640366645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479229.

The product of its (nonzero) digits is 622080, while the sum is 42.

The square root of 2640366645 is about 51384.4981001080. The cubic root of 2640366645 is about 1382.1486246599.

The spelling of 2640366645 in words is "two billion, six hundred forty million, three hundred sixty-six thousand, six hundred forty-five".