189517446484380 has 144 divisors (see below), whose sum is σ = 658876319774400. Its totient is φ = 43194152254464.

The previous prime is 189517446484349. The next prime is 189517446484391. The reversal of 189517446484380 is 83484644715981.

189517446484380 is a `hidden beast` number, since 1 + 8 + 9 + 5 + 1 + 7 + 4 + 464 + 84 + 3 + 80 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 189517446484299 and 189517446484308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 215048329 + ... + 215927808.

Almost surely, 2^{189517446484380} is an apocalyptic number.

189517446484380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189517446484380 is an abundant number, since it is smaller than the sum of its proper divisors (469358873290020).

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

189517446484380 is a wasteful number, since it uses less digits than its factorization.

189517446484380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430976508 (or 430976503 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 72.

The spelling of 189517446484380 in words is "one hundred eighty-nine trillion, five hundred seventeen billion, four hundred forty-six million, four hundred eighty-four thousand, three hundred eighty".