85809670787 has 2 divisors, whose sum is σ = 85809670788. Its totient is φ = 85809670786.

The previous prime is 85809670763. The next prime is 85809670789. The reversal of 85809670787 is 78707690858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85809670787 - 2¹⁰ = 85809669763 is a prime.

Together with 85809670789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85809670789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42904835393 + 42904835394.

It is an arithmetic number, because the mean of its divisors is an integer number (42904835394).

Almost surely, 2^85809670787 is an apocalyptic number.

85809670787 is a deficient number, since it is larger than the sum of its proper divisors (1).

85809670787 is an equidigital number, since it uses as much as digits as its factorization.

85809670787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47416320, while the sum is 65.

The spelling of 85809670787 in words is "eighty-five billion, eight hundred nine million, six hundred seventy thousand, seven hundred eighty-seven".