189581868099 has 48 divisors (see below), whose sum is σ = 298455655680. Its totient is φ = 115266067200.

The previous prime is 189581868067. The next prime is 189581868103. The reversal of 189581868099 is 990868185981.

It is a Cunningham number, because it is equal to 435410²-1.

It is not a de Polignac number, because 189581868099 - 2⁵ = 189581868067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189581868029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5643597 + ... + 5677089.

It is an arithmetic number, because the mean of its divisors is an integer number (6217826160).

Almost surely, 2^189581868099 is an apocalyptic number.

189581868099 is a deficient number, since it is larger than the sum of its proper divisors (108873787581).

189581868099 is a wasteful number, since it uses less digits than its factorization.

189581868099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34092 (or 34089 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 72.

The spelling of 189581868099 in words is "one hundred eighty-nine billion, five hundred eighty-one million, eight hundred sixty-eight thousand, ninety-nine".