18077947799 has 2 divisors, whose sum is σ = 18077947800. Its totient is φ = 18077947798.

The previous prime is 18077947753. The next prime is 18077947831. The reversal of 18077947799 is 99774977081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18077947799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18077947729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9038973899 + 9038973900.

It is an arithmetic number, because the mean of its divisors is an integer number (9038973900).

Almost surely, 2^18077947799 is an apocalyptic number.

18077947799 is a deficient number, since it is larger than the sum of its proper divisors (1).

18077947799 is an equidigital number, since it uses as much as digits as its factorization.

18077947799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56010528, while the sum is 68.

The spelling of 18077947799 in words is "eighteen billion, seventy-seven million, nine hundred forty-seven thousand, seven hundred ninety-nine".