189879798009 has 12 divisors (see below), whose sum is σ = 278281137008. Its totient is φ = 115078665240.

The previous prime is 189879797951. The next prime is 189879798037. The reversal of 189879798009 is 900897978981.

It is not a de Polignac number, because 189879798009 - 2²³ = 189871409401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189879798109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261542059 + ... + 261542784.

Almost surely, 2^189879798009 is an apocalyptic number.

It is an amenable number.

189879798009 is a deficient number, since it is larger than the sum of its proper divisors (88401338999).

189879798009 is a wasteful number, since it uses less digits than its factorization.

189879798009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523084868 (or 523084857 counting only the distinct ones).

The product of its (nonzero) digits is 164602368, while the sum is 75.

The spelling of 189879798009 in words is "one hundred eighty-nine billion, eight hundred seventy-nine million, seven hundred ninety-eight thousand, nine".