85511388647 has 2 divisors, whose sum is σ = 85511388648. Its totient is φ = 85511388646.

The previous prime is 85511388587. The next prime is 85511388701. The reversal of 85511388647 is 74688311558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85511388647 - 2⁶ = 85511388583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85511388592 and 85511388601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85511382647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42755694323 + 42755694324.

It is an arithmetic number, because the mean of its divisors is an integer number (42755694324).

Almost surely, 2^85511388647 is an apocalyptic number.

85511388647 is a deficient number, since it is larger than the sum of its proper divisors (1).

85511388647 is an equidigital number, since it uses as much as digits as its factorization.

85511388647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6451200, while the sum is 56.

The spelling of 85511388647 in words is "eighty-five billion, five hundred eleven million, three hundred eighty-eight thousand, six hundred forty-seven".