85220741791 has 2 divisors, whose sum is σ = 85220741792. Its totient is φ = 85220741790.

The previous prime is 85220741777. The next prime is 85220741833. The reversal of 85220741791 is 19714702258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85220741791 - 2¹³ = 85220733599 is a prime.

It is a super-3 number, since 3×85220741791³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85220741731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42610370895 + 42610370896.

It is an arithmetic number, because the mean of its divisors is an integer number (42610370896).

Almost surely, 2^85220741791 is an apocalyptic number.

85220741791 is a deficient number, since it is larger than the sum of its proper divisors (1).

85220741791 is an equidigital number, since it uses as much as digits as its factorization.

85220741791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 85220741791 in words is "eighty-five billion, two hundred twenty million, seven hundred forty-one thousand, seven hundred ninety-one".