2640565046 has 64 divisors (see below), whose sum is σ = 4725319680. Its totient is φ = 1083438720.

The previous prime is 2640565013. The next prime is 2640565087. The reversal of 2640565046 is 6405650462.

It is a Curzon number.

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, 6271916 + ... + 6272336.

It is an arithmetic number, because the mean of its divisors is an integer number (73833120).

Almost surely, 2^2640565046 is an apocalyptic number.

2640565046 is a deficient number, since it is larger than the sum of its proper divisors (2084754634).

2640565046 is a wasteful number, since it uses less digits than its factorization.

2640565046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669.

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 2640565046 is about 51386.4286169023. The cubic root of 2640565046 is about 1382.1832426805.

The spelling of 2640565046 in words is "two billion, six hundred forty million, five hundred sixty-five thousand, forty-six".