78904022399 has 2 divisors, whose sum is σ = 78904022400. Its totient is φ = 78904022398.

The previous prime is 78904022381. The next prime is 78904022419. The reversal of 78904022399 is 99322040987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78904022399 - 2²⁰ = 78902973823 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78904022399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78904022369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39452011199 + 39452011200.

It is an arithmetic number, because the mean of its divisors is an integer number (39452011200).

Almost surely, 2^78904022399 is an apocalyptic number.

78904022399 is a deficient number, since it is larger than the sum of its proper divisors (1).

78904022399 is an equidigital number, since it uses as much as digits as its factorization.

78904022399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 78904022399 in words is "seventy-eight billion, nine hundred four million, twenty-two thousand, three hundred ninety-nine".