5478428815731 has 10 divisors (see below), whose sum is σ = 8183825761892. Its totient is φ = 3652285877100.

The previous prime is 5478428815723. The next prime is 5478428815777. The reversal of 5478428815731 is 1375188248745.

5478428815731 is a `hidden beast` number, since 5 + 478 + 4 + 2 + 8 + 8 + 157 + 3 + 1 = 666.

It is not a de Polignac number, because 5478428815731 - 2³ = 5478428815723 is a prime.

It is a super-4 number, since 4×5478428815731⁴ (a number of 52 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5478428815711) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 33817461745 + ... + 33817461906.

Almost surely, 2^{5478428815731} is an apocalyptic number.

5478428815731 is a deficient number, since it is larger than the sum of its proper divisors (2705396946161).

5478428815731 is an equidigital number, since it uses as much as digits as its factorization.

5478428815731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67634923663 (or 67634923654 counting only the distinct ones).

The product of its digits is 60211200, while the sum is 63.

The spelling of 5478428815731 in words is "five trillion, four hundred seventy-eight billion, four hundred twenty-eight million, eight hundred fifteen thousand, seven hundred thirty-one".