8625661998 has 16 divisors (see below), whose sum is σ = 17313606480. Its totient is φ = 2864840256.

The previous prime is 8625661949. The next prime is 8625662021. The reversal of 8625661998 is 8991665268.

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, 2593303 + ... + 2596626.

It is an arithmetic number, because the mean of its divisors is an integer number (1082100405).

Almost surely, 2^8625661998 is an apocalyptic number.

8625661998 is an abundant number, since it is smaller than the sum of its proper divisors (8687944482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8625661998 is a wasteful number, since it uses less digits than its factorization.

8625661998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190211.

The product of its digits is 11197440, while the sum is 60.

The square root of 8625661998 is about 92874.4421140714. The cubic root of 8625661998 is about 2050.8354316913.

The spelling of 8625661998 in words is "eight billion, six hundred twenty-five million, six hundred sixty-one thousand, nine hundred ninety-eight".