189999529632 has 192 divisors, whose sum is σ = 606522470400. Its totient is φ = 57387191040.

The previous prime is 189999529627. The next prime is 189999529663. The reversal of 189999529632 is 236925999981.

189999529632 is a `hidden beast` number, since 1 + 8 + 9 + 9 + 99 + 529 + 6 + 3 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2885169 + ... + 2950287.

It is an arithmetic number, because the mean of its divisors is an integer number (3158971200).

Almost surely, 2^189999529632 is an apocalyptic number.

189999529632 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 189999529632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303261235200).

189999529632 is an abundant number, since it is smaller than the sum of its proper divisors (416522940768).

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

189999529632 is a wasteful number, since it uses less digits than its factorization.

189999529632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65456 (or 65442 counting only the distinct ones).

The product of its digits is 170061120, while the sum is 72.

The spelling of 189999529632 in words is "one hundred eighty-nine billion, nine hundred ninety-nine million, five hundred twenty-nine thousand, six hundred thirty-two".