189491648560 has 20 divisors (see below), whose sum is σ = 440568083088. Its totient is φ = 75796659392.

The previous prime is 189491648543. The next prime is 189491648569. The reversal of 189491648560 is 65846194981.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (189491648569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1184322724 + ... + 1184322883.

Almost surely, 2^189491648560 is an apocalyptic number.

189491648560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189491648560 is an abundant number, since it is smaller than the sum of its proper divisors (251076434528).

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

189491648560 is a wasteful number, since it uses less digits than its factorization.

189491648560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368645620 (or 2368645614 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 61.

The spelling of 189491648560 in words is "one hundred eighty-nine billion, four hundred ninety-one million, six hundred forty-eight thousand, five hundred sixty".