85715128633 has 2 divisors, whose sum is σ = 85715128634. Its totient is φ = 85715128632.

The previous prime is 85715128487. The next prime is 85715128679. The reversal of 85715128633 is 33682151758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77046215184 + 8668913449 = 277572^2 + 93107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85715128633 is a prime.

It is not a weakly prime, because it can be changed into another prime (85715128133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42857564316 + 42857564317.

It is an arithmetic number, because the mean of its divisors is an integer number (42857564317).

Almost surely, 2^85715128633 is an apocalyptic number.

It is an amenable number.

85715128633 is a deficient number, since it is larger than the sum of its proper divisors (1).

85715128633 is an equidigital number, since it uses as much as digits as its factorization.

85715128633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 49.

The spelling of 85715128633 in words is "eighty-five billion, seven hundred fifteen million, one hundred twenty-eight thousand, six hundred thirty-three".