189298368721 has 32 divisors (see below), whose sum is σ = 244968062976. Its totient is φ = 141958008000.

The previous prime is 189298368713. The next prime is 189298368751. The reversal of 189298368721 is 127863892981.

It is a cyclic number.

It is not a de Polignac number, because 189298368721 - 2³ = 189298368713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189298368751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212976 + ... + 651118.

It is an arithmetic number, because the mean of its divisors is an integer number (7655251968).

Almost surely, 2^189298368721 is an apocalyptic number.

189298368721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

189298368721 is a deficient number, since it is larger than the sum of its proper divisors (55669694255).

189298368721 is a wasteful number, since it uses less digits than its factorization.

189298368721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438373.

The product of its digits is 20901888, while the sum is 64.

The spelling of 189298368721 in words is "one hundred eighty-nine billion, two hundred ninety-eight million, three hundred sixty-eight thousand, seven hundred twenty-one".