8161393898 has 16 divisors (see below), whose sum is σ = 14813959104. Its totient is φ = 3291990720.

The previous prime is 8161393861. The next prime is 8161393907. The reversal of 8161393898 is 8983931618.

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, 17145548 + ... + 17146023.

It is an arithmetic number, because the mean of its divisors is an integer number (925872444).

Almost surely, 2^8161393898 is an apocalyptic number.

8161393898 is a deficient number, since it is larger than the sum of its proper divisors (6652565206).

8161393898 is a wasteful number, since it uses less digits than its factorization.

8161393898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34291597.

The product of its digits is 2239488, while the sum is 56.

The square root of 8161393898 is about 90340.4333507428. The cubic root of 8161393898 is about 2013.3600473469.

The spelling of 8161393898 in words is "eight billion, one hundred sixty-one million, three hundred ninety-three thousand, eight hundred ninety-eight".