189140226587 has 4 divisors (see below), whose sum is σ = 203689474800. Its totient is φ = 174590978376.

The previous prime is 189140226551. The next prime is 189140226607. The reversal of 189140226587 is 785622041981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189140226587 - 2⁶ = 189140226523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189140229587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7274624087 + ... + 7274624112.

It is an arithmetic number, because the mean of its divisors is an integer number (50922368700).

Almost surely, 2^189140226587 is an apocalyptic number.

189140226587 is a deficient number, since it is larger than the sum of its proper divisors (14549248213).

189140226587 is a wasteful number, since it uses less digits than its factorization.

189140226587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14549248212.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 189140226587 in words is "one hundred eighty-nine billion, one hundred forty million, two hundred twenty-six thousand, five hundred eighty-seven".