189509198530 has 32 divisors (see below), whose sum is σ = 342148147200. Its totient is φ = 75574736832.

The previous prime is 189509198507. The next prime is 189509198537. The reversal of 189509198530 is 35891905981.

It is not an unprimeable number, because it can be changed into a prime (189509198537) 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 15 ways as a sum of consecutive naturals, for example, 5265436 + ... + 5301304.

It is an arithmetic number, because the mean of its divisors is an integer number (10692129600).

Almost surely, 2^189509198530 is an apocalyptic number.

189509198530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189509198530 is a deficient number, since it is larger than the sum of its proper divisors (152638948670).

189509198530 is a wasteful number, since it uses less digits than its factorization.

189509198530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37458.

The product of its (nonzero) digits is 3499200, while the sum is 58.

The spelling of 189509198530 in words is "one hundred eighty-nine billion, five hundred nine million, one hundred ninety-eight thousand, five hundred thirty".