2640599423279 has 4 divisors (see below), whose sum is σ = 2640614219784. Its totient is φ = 2640584626776.

The previous prime is 2640599423269. The next prime is 2640599423309. The reversal of 2640599423279 is 9723249950462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640599423279 is a prime.

It is a super-2 number, since 2×2640599423279² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640599423219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7127252 + ... + 7488585.

It is an arithmetic number, because the mean of its divisors is an integer number (660153554946).

Almost surely, 2^{2640599423279} is an apocalyptic number.

2640599423279 is a deficient number, since it is larger than the sum of its proper divisors (14796505).

2640599423279 is a wasteful number, since it uses less digits than its factorization.

2640599423279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14796504.

The product of its (nonzero) digits is 58786560, while the sum is 62.

The spelling of 2640599423279 in words is "two trillion, six hundred forty billion, five hundred ninety-nine million, four hundred twenty-three thousand, two hundred seventy-nine".