189879995290 has 16 divisors (see below), whose sum is σ = 341801171712. Its totient is φ = 75948180304.

The previous prime is 189879995273. The next prime is 189879995311. The reversal of 189879995290 is 92599978981.

It is a super-2 number, since 2×189879995290² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263794 + ... + 670333.

It is an arithmetic number, because the mean of its divisors is an integer number (21362573232).

Almost surely, 2^189879995290 is an apocalyptic number.

189879995290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189879995290 is a deficient number, since it is larger than the sum of its proper divisors (151921176422).

189879995290 is a wasteful number, since it uses less digits than its factorization.

189879995290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954461.

The product of its (nonzero) digits is 264539520, while the sum is 76.

The spelling of 189879995290 in words is "one hundred eighty-nine billion, eight hundred seventy-nine million, nine hundred ninety-five thousand, two hundred ninety".