189864278641 has 8 divisors (see below), whose sum is σ = 193913414784. Its totient is φ = 185815537200.

The previous prime is 189864278603. The next prime is 189864278713. The reversal of 189864278641 is 146872468981.

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 189864278641 - 2⁹ = 189864278129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189864278941) 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, 1003491 + ... + 1177591.

It is an arithmetic number, because the mean of its divisors is an integer number (24239176848).

Almost surely, 2^189864278641 is an apocalyptic number.

It is an amenable number.

189864278641 is a deficient number, since it is larger than the sum of its proper divisors (4049136143).

189864278641 is a wasteful number, since it uses less digits than its factorization.

189864278641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197351.

The product of its digits is 37158912, while the sum is 64.

The spelling of 189864278641 in words is "one hundred eighty-nine billion, eight hundred sixty-four million, two hundred seventy-eight thousand, six hundred forty-one".