189999788146 has 32 divisors (see below), whose sum is σ = 326519930880. Its totient is φ = 81227207376.

The previous prime is 189999788129. The next prime is 189999788149. The reversal of 189999788146 is 641887999981.

It is not an unprimeable number, because it can be changed into a prime (189999788149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11064315 + ... + 11081473.

It is an arithmetic number, because the mean of its divisors is an integer number (10203747840).

Almost surely, 2^189999788146 is an apocalyptic number.

189999788146 is a deficient number, since it is larger than the sum of its proper divisors (136520142734).

189999788146 is a wasteful number, since it uses less digits than its factorization.

189999788146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19078.

The product of its digits is 564350976, while the sum is 79.

The spelling of 189999788146 in words is "one hundred eighty-nine billion, nine hundred ninety-nine million, seven hundred eighty-eight thousand, one hundred forty-six".