189788864830 has 16 divisors (see below), whose sum is σ = 341663799600. Its totient is φ = 75905803072.

The previous prime is 189788864821. The next prime is 189788864843. The reversal of 189788864830 is 38468887981.

It is a self number, because there is not a number n which added to its sum of digits gives 189788864830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1135780 + ... + 1292119.

It is an arithmetic number, because the mean of its divisors is an integer number (21353987475).

Almost surely, 2^189788864830 is an apocalyptic number.

189788864830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189788864830 is a deficient number, since it is larger than the sum of its proper divisors (151874934770).

189788864830 is a wasteful number, since it uses less digits than its factorization.

189788864830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435723.

The product of its (nonzero) digits is 148635648, while the sum is 70.

The spelling of 189788864830 in words is "one hundred eighty-nine billion, seven hundred eighty-eight million, eight hundred sixty-four thousand, eight hundred thirty".