85128052797 has 12 divisors (see below), whose sum is σ = 122968465984. Its totient is φ = 56749393800.

The previous prime is 85128052759. The next prime is 85128052843. The reversal of 85128052797 is 79725082158.

85128052797 is a `hidden beast` number, since 8 + 5 + 1 + 28 + 0 + 527 + 97 = 666.

It is not a de Polignac number, because 85128052797 - 2¹⁰ = 85128051773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85128054797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4933 + ... + 412650.

Almost surely, 2^85128052797 is an apocalyptic number.

It is an amenable number.

85128052797 is a deficient number, since it is larger than the sum of its proper divisors (37840413187).

85128052797 is a wasteful number, since it uses less digits than its factorization.

85128052797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440240 (or 440237 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 85128052797 in words is "eighty-five billion, one hundred twenty-eight million, fifty-two thousand, seven hundred ninety-seven".