189666426880 has 400 divisors, whose sum is σ = 579820567680. Its totient is φ = 57982058496.

The previous prime is 189666426871. The next prime is 189666426881. The reversal of 189666426880 is 88624666981.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (189666426881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9982443511 + ... + 9982443529.

Almost surely, 2^189666426880 is an apocalyptic number.

189666426880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189666426880 is a droll number since its even prime factors and its odd prime factors have the same sum.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189666426880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289910283840).

189666426880 is an abundant number, since it is smaller than the sum of its proper divisors (390154140800).

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

189666426880 is an frugal number, since it uses more digits than its factorization.

189666426880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 64.

The spelling of 189666426880 in words is "one hundred eighty-nine billion, six hundred sixty-six million, four hundred twenty-six thousand, eight hundred eighty".