189117205944 has 64 divisors (see below), whose sum is σ = 474160189440. Its totient is φ = 62856984960.

The previous prime is 189117205943. The next prime is 189117205967. The reversal of 189117205944 is 449502711981.

It is a super-2 number, since 2×189117205944² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189117205943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17407074 + ... + 17417934.

It is an arithmetic number, because the mean of its divisors is an integer number (7408752960).

Almost surely, 2^189117205944 is an apocalyptic number.

It is an amenable number.

189117205944 is an abundant number, since it is smaller than the sum of its proper divisors (285042983496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189117205944 is a wasteful number, since it uses less digits than its factorization.

189117205944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12900 (or 12896 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 189117205944 in words is "one hundred eighty-nine billion, one hundred seventeen million, two hundred five thousand, nine hundred forty-four".