2169985898 has 16 divisors (see below), whose sum is σ = 3312524160. Its totient is φ = 1065837696.

The previous prime is 2169985897. The next prime is 2169985907. The reversal of 2169985898 is 8985899612.

2169985898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2169985891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180986 + ... + 192602.

It is an arithmetic number, because the mean of its divisors is an integer number (207032760).

Almost surely, 2^2169985898 is an apocalyptic number.

2169985898 is a deficient number, since it is larger than the sum of its proper divisors (1142538262).

2169985898 is a wasteful number, since it uses less digits than its factorization.

2169985898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13261.

The product of its digits is 22394880, while the sum is 65.

The square root of 2169985898 is about 46583.1074317719. The cubic root of 2169985898 is about 1294.6497858903.

The spelling of 2169985898 in words is "two billion, one hundred sixty-nine million, nine hundred eighty-five thousand, eight hundred ninety-eight".