2640248079 has 8 divisors (see below), whose sum is σ = 4023235200. Its totient is φ = 1508713176.

The previous prime is 2640248071. The next prime is 2640248089. The reversal of 2640248079 is 9708420462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2640248079 - 2³ = 2640248071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2640248079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640248071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62863029 + ... + 62863070.

It is an arithmetic number, because the mean of its divisors is an integer number (502904400).

Almost surely, 2^2640248079 is an apocalyptic number.

2640248079 is a deficient number, since it is larger than the sum of its proper divisors (1382987121).

2640248079 is a wasteful number, since it uses less digits than its factorization.

2640248079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125726109.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 2640248079 is about 51383.3443734446. The cubic root of 2640248079 is about 1382.1279358302.

The spelling of 2640248079 in words is "two billion, six hundred forty million, two hundred forty-eight thousand, seventy-nine".