189991370330 has 16 divisors (see below), whose sum is σ = 341993573064. Its totient is φ = 75994524480.

The previous prime is 189991370329. The next prime is 189991370339. The reversal of 189991370330 is 33073199981.

It can be written as a sum of positive squares in 4 ways, for example, as 180418509049 + 9572861281 = 424757^2 + 97841^2 .

It is not an unprimeable number, because it can be changed into a prime (189991370339) 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, 176000 + ... + 641060.

Almost surely, 2^189991370330 is an apocalyptic number.

189991370330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189991370330 is a deficient number, since it is larger than the sum of its proper divisors (152002202734).

189991370330 is a wasteful number, since it uses less digits than its factorization.

189991370330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505921.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 189991370330 in words is "one hundred eighty-nine billion, nine hundred ninety-one million, three hundred seventy thousand, three hundred thirty".