189921316480 has 128 divisors (see below), whose sum is σ = 535631016960. Its totient is φ = 63015321600.

The previous prime is 189921316469. The next prime is 189921316493. The reversal of 189921316480 is 84613129981.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544881 + ... + 822640.

It is an arithmetic number, because the mean of its divisors is an integer number (4184617320).

Almost surely, 2^189921316480 is an apocalyptic number.

189921316480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189921316480 is an abundant number, since it is smaller than the sum of its proper divisors (345709700480).

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

189921316480 is a wasteful number, since it uses less digits than its factorization.

189921316480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367578 (or 1367566 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 189921316480 in words is "one hundred eighty-nine billion, nine hundred twenty-one million, three hundred sixteen thousand, four hundred eighty".