189883963644 has 24 divisors (see below), whose sum is σ = 447449342928. Its totient is φ = 62667974400.

The previous prime is 189883963639. The next prime is 189883963649. The reversal of 189883963644 is 446369388981.

It is an interprime number because it is at equal distance from previous prime (189883963639) and next prime (189883963649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189883963649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78333757 + ... + 78336180.

It is an arithmetic number, because the mean of its divisors is an integer number (18643722622).

Almost surely, 2^189883963644 is an apocalyptic number.

It is an amenable number.

189883963644 is an abundant number, since it is smaller than the sum of its proper divisors (257565379284).

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

189883963644 is a wasteful number, since it uses less digits than its factorization.

189883963644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156670045 (or 156670043 counting only the distinct ones).

The product of its digits is 214990848, while the sum is 69.

The spelling of 189883963644 in words is "one hundred eighty-nine billion, eight hundred eighty-three million, nine hundred sixty-three thousand, six hundred forty-four".