189045685940 has 24 divisors (see below), whose sum is σ = 397048002120. Its totient is φ = 75608357888.

The previous prime is 189045685901. The next prime is 189045685951. The reversal of 189045685940 is 49586540981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 82793156644 + 106252529296 = 287738^2 + 325964^2 .

It is a super-2 number, since 2×189045685940² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 189045685940.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462485 + ... + 769404.

It is an arithmetic number, because the mean of its divisors is an integer number (16543666755).

Almost surely, 2^189045685940 is an apocalyptic number.

189045685940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189045685940 is an abundant number, since it is smaller than the sum of its proper divisors (208002316180).

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

189045685940 is a wasteful number, since it uses less digits than its factorization.

189045685940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239571 (or 1239569 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 59.

The spelling of 189045685940 in words is "one hundred eighty-nine billion, forty-five million, six hundred eighty-five thousand, nine hundred forty".