5478173391887 has 8 divisors (see below), whose sum is σ = 6260925935616. Its totient is φ = 4695459934392.

The previous prime is 5478173391857. The next prime is 5478173391947. The reversal of 5478173391887 is 7881933718745.

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 5478173391887 - 2¹⁴ = 5478173375503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5478173391887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5478173391827) 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, 9470603 + ... + 10032380.

It is an arithmetic number, because the mean of its divisors is an integer number (782615741952).

Almost surely, 2^{5478173391887} is an apocalyptic number.

5478173391887 is a deficient number, since it is larger than the sum of its proper divisors (782752543729).

5478173391887 is a wasteful number, since it uses less digits than its factorization.

5478173391887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19543117.

The product of its digits is 284497920, while the sum is 71.

The spelling of 5478173391887 in words is "five trillion, four hundred seventy-eight billion, one hundred seventy-three million, three hundred ninety-one thousand, eight hundred eighty-seven".