189926064309 has 8 divisors (see below), whose sum is σ = 254520208800. Its totient is φ = 125974648016.

The previous prime is 189926064253. The next prime is 189926064323. The reversal of 189926064309 is 903460629981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189926064309 - 2²¹ = 189923967157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189926064709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160681359 + ... + 160682540.

It is an arithmetic number, because the mean of its divisors is an integer number (31815026100).

Almost surely, 2^189926064309 is an apocalyptic number.

It is an amenable number.

189926064309 is a deficient number, since it is larger than the sum of its proper divisors (64594144491).

189926064309 is a wasteful number, since it uses less digits than its factorization.

189926064309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321364099.

The product of its (nonzero) digits is 5038848, while the sum is 57.

The spelling of 189926064309 in words is "one hundred eighty-nine billion, nine hundred twenty-six million, sixty-four thousand, three hundred nine".