8557998899 has 6 divisors (see below), whose sum is σ = 8655244620. Its totient is φ = 8461833776.

The previous prime is 8557998877. The next prime is 8557998923. The reversal of 8557998899 is 9988997558.

It is a de Polignac number, because none of the positive numbers 2^k-8557998899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8557998199) 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 in 5 ways as a sum of consecutive naturals, for example, 532289 + ... + 548130.

It is an arithmetic number, because the mean of its divisors is an integer number (1442540770).

Almost surely, 2^8557998899 is an apocalyptic number.

8557998899 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

8557998899 is a deficient number, since it is larger than the sum of its proper divisors (97245721).

8557998899 is an equidigital number, since it uses as much as digits as its factorization.

8557998899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080597 (or 1080508 counting only the distinct ones).

The product of its digits is 587865600, while the sum is 77.

The square root of 8557998899 is about 92509.4530250828. The cubic root of 8557998899 is about 2045.4588273502.

The spelling of 8557998899 in words is "eight billion, five hundred fifty-seven million, nine hundred ninety-eight thousand, eight hundred ninety-nine".