189926555 has 32 divisors (see below), whose sum is σ = 287376768. Its totient is φ = 117273600.

The previous prime is 189926549. The next prime is 189926563. The reversal of 189926555 is 555629981.

It is a de Polignac number, because none of the positive numbers 2^k-189926555 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13565 + ... + 23745.

It is an arithmetic number, because the mean of its divisors is an integer number (8980524).

Almost surely, 2^189926555 is an apocalyptic number.

189926555 is a deficient number, since it is larger than the sum of its proper divisors (97450213).

189926555 is a wasteful number, since it uses less digits than its factorization.

189926555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10247.

The product of its digits is 972000, while the sum is 50.

The square root of 189926555 is about 13781.3843644244. The cubic root of 189926555 is about 574.8156233046.

The spelling of 189926555 in words is "one hundred eighty-nine million, nine hundred twenty-six thousand, five hundred fifty-five".