8997557998 has 16 divisors (see below), whose sum is σ = 15855836976. Its totient is φ = 3775199040.

The previous prime is 8997557983. The next prime is 8997558007.

8997557998 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15729711 + ... + 15730282.

It is an arithmetic number, because the mean of its divisors is an integer number (990989811).

Almost surely, 2^8997557998 is an apocalyptic number.

8997557998 is a deficient number, since it is larger than the sum of its proper divisors (6858278978).

8997557998 is a wasteful number, since it uses less digits than its factorization.

8997557998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31460019.

The product of its digits is 514382400, while the sum is 76.

The square root of 8997557998 is about 94855.4584512668. The cubic root of 8997557998 is about 2079.8956738540.

The spelling of 8997557998 in words is "eight billion, nine hundred ninety-seven million, five hundred fifty-seven thousand, nine hundred ninety-eight".