2640362823 has 12 divisors (see below), whose sum is σ = 4358694288. Its totient is φ = 1508778720.

The previous prime is 2640362807. The next prime is 2640362843. The reversal of 2640362823 is 3282630462.

2640362823 is a `hidden beast` number, since 2 + 6 + 4 + 0 + 3 + 628 + 23 = 666.

It is not a de Polignac number, because 2640362823 - 2⁴ = 2640362807 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640362843) 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 11 ways as a sum of consecutive naturals, for example, 20955198 + ... + 20955323.

It is an arithmetic number, because the mean of its divisors is an integer number (363224524).

Almost surely, 2^2640362823 is an apocalyptic number.

2640362823 is a deficient number, since it is larger than the sum of its proper divisors (1718331465).

2640362823 is a wasteful number, since it uses less digits than its factorization.

2640362823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41910534 (or 41910531 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 2640362823 is about 51384.4609098899. The cubic root of 2640362823 is about 1382.1479577607.

The spelling of 2640362823 in words is "two billion, six hundred forty million, three hundred sixty-two thousand, eight hundred twenty-three".