189878677632 has 512 divisors, whose sum is σ = 670213440000. Its totient is φ = 51774750720.

The previous prime is 189878677601. The next prime is 189878677633. The reversal of 189878677632 is 236776878981.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (189878677633) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62438032 + ... + 62441072.

It is an arithmetic number, because the mean of its divisors is an integer number (1309010625).

Almost surely, 2^189878677632 is an apocalyptic number.

189878677632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189878677632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335106720000).

189878677632 is an abundant number, since it is smaller than the sum of its proper divisors (480334762368).

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

189878677632 is a wasteful number, since it uses less digits than its factorization.

189878677632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189 (or 3171 counting only the distinct ones).

The product of its digits is 341397504, while the sum is 72.

The spelling of 189878677632 in words is "one hundred eighty-nine billion, eight hundred seventy-eight million, six hundred seventy-seven thousand, six hundred thirty-two".