40249798579 has 2 divisors, whose sum is σ = 40249798580. Its totient is φ = 40249798578.

The previous prime is 40249798573. The next prime is 40249798619. The reversal of 40249798579 is 97589794204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40249798579 - 2⁹ = 40249798067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40249798579.

It is not a weakly prime, because it can be changed into another prime (40249798573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20124899289 + 20124899290.

It is an arithmetic number, because the mean of its divisors is an integer number (20124899290).

Almost surely, 2^40249798579 is an apocalyptic number.

40249798579 is a deficient number, since it is larger than the sum of its proper divisors (1).

40249798579 is an equidigital number, since it uses as much as digits as its factorization.

40249798579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45722880, while the sum is 64.

The spelling of 40249798579 in words is "forty billion, two hundred forty-nine million, seven hundred ninety-eight thousand, five hundred seventy-nine".