189454516881 has 8 divisors (see below), whose sum is σ = 288692597184. Its totient is φ = 108259723920.

The previous prime is 189454516873. The next prime is 189454516883. The reversal of 189454516881 is 188615454981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189454516881 - 2³ = 189454516873 is a prime.

It is a super-2 number, since 2×189454516881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189454516883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4510821810 + ... + 4510821851.

It is an arithmetic number, because the mean of its divisors is an integer number (36086574648).

Almost surely, 2^189454516881 is an apocalyptic number.

It is an amenable number.

189454516881 is a deficient number, since it is larger than the sum of its proper divisors (99238080303).

189454516881 is an equidigital number, since it uses as much as digits as its factorization.

189454516881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9021643671.

The product of its digits is 11059200, while the sum is 60.

The spelling of 189454516881 in words is "one hundred eighty-nine billion, four hundred fifty-four million, five hundred sixteen thousand, eight hundred eighty-one".