189485645580 has 864 divisors, whose sum is σ = 758738792448. Its totient is φ = 37146470400.

The previous prime is 189485645519. The next prime is 189485645597. The reversal of 189485645580 is 85546584981.

189485645580 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 8 + 5 + 6 + 45 + 580 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1206914862 + ... + 1206915018.

Almost surely, 2^189485645580 is an apocalyptic number.

189485645580 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 189485645580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379369396224).

189485645580 is an abundant number, since it is smaller than the sum of its proper divisors (569253146868).

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

189485645580 is a wasteful number, since it uses less digits than its factorization.

189485645580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 55296000, while the sum is 63.

The spelling of 189485645580 in words is "one hundred eighty-nine billion, four hundred eighty-five million, six hundred forty-five thousand, five hundred eighty".