85428074817 has 8 divisors (see below), whose sum is σ = 126560110880. Its totient is φ = 56952049860.

The previous prime is 85428074813. The next prime is 85428074833. The reversal of 85428074817 is 71847082458.

85428074817 is a `hidden beast` number, since 8 + 542 + 80 + 7 + 4 + 8 + 17 = 666.

It is not a de Polignac number, because 85428074817 - 2² = 85428074813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85428074813) 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, 1582001359 + ... + 1582001412.

It is an arithmetic number, because the mean of its divisors is an integer number (15820013860).

Almost surely, 2^85428074817 is an apocalyptic number.

It is an amenable number.

85428074817 is a deficient number, since it is larger than the sum of its proper divisors (41132036063).

85428074817 is a wasteful number, since it uses less digits than its factorization.

85428074817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164002780 (or 3164002774 counting only the distinct ones).

The product of its (nonzero) digits is 4014080, while the sum is 54.

The spelling of 85428074817 in words is "eighty-five billion, four hundred twenty-eight million, seventy-four thousand, eight hundred seventeen".