285128715647 has 8 divisors (see below), whose sum is σ = 302480466912. Its totient is φ = 267841350400.

The previous prime is 285128715643. The next prime is 285128715659. The reversal of 285128715647 is 746517821582.

It is a happy number.

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 285128715647 - 2² = 285128715643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285128715592 and 285128715601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285128715643) 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, 16087379 + ... + 16105092.

It is an arithmetic number, because the mean of its divisors is an integer number (37810058364).

Almost surely, 2^285128715647 is an apocalyptic number.

285128715647 is a deficient number, since it is larger than the sum of its proper divisors (17351751265).

285128715647 is a wasteful number, since it uses less digits than its factorization.

285128715647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32193009.

The product of its digits is 7526400, while the sum is 56.

The spelling of 285128715647 in words is "two hundred eighty-five billion, one hundred twenty-eight million, seven hundred fifteen thousand, six hundred forty-seven".