189375189561 has 48 divisors (see below), whose sum is σ = 293852707200. Its totient is φ = 117093957120.

The previous prime is 189375189551. The next prime is 189375189571. The reversal of 189375189561 is 165981573981.

189375189561 is a `hidden beast` number, since 1 + 89 + 37 + 518 + 9 + 5 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (189375189551) and next prime (189375189571).

It is not a de Polignac number, because 189375189561 - 2¹⁴ = 189375173177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189375189551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44525311 + ... + 44529563.

It is an arithmetic number, because the mean of its divisors is an integer number (6121931400).

Almost surely, 2^189375189561 is an apocalyptic number.

It is an amenable number.

189375189561 is a deficient number, since it is larger than the sum of its proper divisors (104477517639).

189375189561 is a wasteful number, since it uses less digits than its factorization.

189375189561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8446 (or 8443 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 63.

The spelling of 189375189561 in words is "one hundred eighty-nine billion, three hundred seventy-five million, one hundred eighty-nine thousand, five hundred sixty-one".