2640599423269 has 2 divisors, whose sum is σ = 2640599423270. Its totient is φ = 2640599423268.

The previous prime is 2640599423227. The next prime is 2640599423309. The reversal of 2640599423269 is 9623249950462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2578314238369 + 62285184900 = 1605713^2 + 249570^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640599423269 - 2⁹ = 2640599422757 is a prime.

It is a super-2 number, since 2×2640599423269² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2640599423219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320299711634 + 1320299711635.

It is an arithmetic number, because the mean of its divisors is an integer number (1320299711635).

Almost surely, 2^{2640599423269} is an apocalyptic number.

It is an amenable number.

2640599423269 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640599423269 is an equidigital number, since it uses as much as digits as its factorization.

2640599423269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50388480, while the sum is 61.

The spelling of 2640599423269 in words is "two trillion, six hundred forty billion, five hundred ninety-nine million, four hundred twenty-three thousand, two hundred sixty-nine".