189163559042 has 4 divisors (see below), whose sum is σ = 283745338566. Its totient is φ = 94581779520.

The previous prime is 189163559033. The next prime is 189163559069. The reversal of 189163559042 is 240955361981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240955361981 = 277 ⋅869874953.

It can be written as a sum of positive squares in only one way, i.e., 186562661041 + 2600898001 = 431929^2 + 50999^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47290889759 + ... + 47290889762.

Almost surely, 2^189163559042 is an apocalyptic number.

189163559042 is a deficient number, since it is larger than the sum of its proper divisors (94581779524).

189163559042 is an equidigital number, since it uses as much as digits as its factorization.

189163559042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94581779523.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 189163559042 in words is "one hundred eighty-nine billion, one hundred sixty-three million, five hundred fifty-nine thousand, forty-two".