2640971223 has 40 divisors (see below), whose sum is σ = 4337879040. Its totient is φ = 1587917520.

The previous prime is 2640971213. The next prime is 2640971239. The reversal of 2640971223 is 3221790462.

2640971223 is a `hidden beast` number, since 2 + 640 + 9 + 7 + 1 + 2 + 2 + 3 = 666.

It is not a de Polignac number, because 2640971223 - 2⁸ = 2640970967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640971213) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 101488 + ... + 124826.

It is an arithmetic number, because the mean of its divisors is an integer number (108446976).

Almost surely, 2^2640971223 is an apocalyptic number.

2640971223 is a deficient number, since it is larger than the sum of its proper divisors (1696907817).

2640971223 is a wasteful number, since it uses less digits than its factorization.

2640971223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23489 (or 23480 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 2640971223 is about 51390.3806465763. The cubic root of 2640971223 is about 1382.2541091112.

The spelling of 2640971223 in words is "two billion, six hundred forty million, nine hundred seventy-one thousand, two hundred twenty-three".