85767723191 has 2 divisors, whose sum is σ = 85767723192. Its totient is φ = 85767723190.

The previous prime is 85767723169. The next prime is 85767723193. The reversal of 85767723191 is 19132776758.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85767723191 - 2¹⁰ = 85767722167 is a prime.

It is a super-2 number, since 2×85767723191² (a number of 23 digits) contains 22 as substring.

Together with 85767723193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85767723193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42883861595 + 42883861596.

It is an arithmetic number, because the mean of its divisors is an integer number (42883861596).

Almost surely, 2^85767723191 is an apocalyptic number.

85767723191 is a deficient number, since it is larger than the sum of its proper divisors (1).

85767723191 is an equidigital number, since it uses as much as digits as its factorization.

85767723191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4445280, while the sum is 56.

The spelling of 85767723191 in words is "eighty-five billion, seven hundred sixty-seven million, seven hundred twenty-three thousand, one hundred ninety-one".