189991948570380 has 576 divisors, whose sum is σ = 680456203435008. Its totient is φ = 44048129495040.

The previous prime is 189991948570379. The next prime is 189991948570409. The reversal of 189991948570380 is 83075849199981.

It is a happy number.

189991948570380 is a `hidden beast` number, since 1 + 8 + 9 + 9 + 9 + 1 + 9 + 4 + 8 + 570 + 38 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 189991948570380.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 9316517464 + ... + 9316537856.

It is an arithmetic number, because the mean of its divisors is an integer number (1181347575408).

Almost surely, 2^{189991948570380} is an apocalyptic number.

189991948570380 is a gapful number since it is divisible by the number (10) 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 189991948570380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340228101717504).

189991948570380 is an abundant number, since it is smaller than the sum of its proper divisors (490464254864628).

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

189991948570380 is a wasteful number, since it uses less digits than its factorization.

189991948570380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28028 (or 28014 counting only the distinct ones).

The product of its (nonzero) digits is 1410877440, while the sum is 81.

The spelling of 189991948570380 in words is "one hundred eighty-nine trillion, nine hundred ninety-one billion, nine hundred forty-eight million, five hundred seventy thousand, three hundred eighty".