8478187438889 has 8 divisors (see below), whose sum is σ = 9697318756608. Its totient is φ = 7261046542080.

The previous prime is 8478187438883. The next prime is 8478187438909. The reversal of 8478187438889 is 9888347818748.

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

It is a cyclic number.

It is not a de Polignac number, because 8478187438889 - 2³² = 8473892471593 is a prime.

It is a super-2 number, since 2×8478187438889² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8478187438883) 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, 497596097 + ... + 497613134.

It is an arithmetic number, because the mean of its divisors is an integer number (1212164844576).

Almost surely, 2^{8478187438889} is an apocalyptic number.

It is an amenable number.

8478187438889 is a deficient number, since it is larger than the sum of its proper divisors (1219131317719).

8478187438889 is a wasteful number, since it uses less digits than its factorization.

8478187438889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995210455.

The product of its digits is 5549064192, while the sum is 83.

The spelling of 8478187438889 in words is "eight trillion, four hundred seventy-eight billion, one hundred eighty-seven million, four hundred thirty-eight thousand, eight hundred eighty-nine".