851346521791 has 2 divisors, whose sum is σ = 851346521792. Its totient is φ = 851346521790.

The previous prime is 851346521699. The next prime is 851346521843. The reversal of 851346521791 is 197125643158.

It is an a-pointer prime, because the next prime (851346521843) can be obtained adding 851346521791 to its sum of digits (52).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 851346521791 - 2²¹ = 851344424639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851346521191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425673260895 + 425673260896.

It is an arithmetic number, because the mean of its divisors is an integer number (425673260896).

Almost surely, 2^851346521791 is an apocalyptic number.

851346521791 is a deficient number, since it is larger than the sum of its proper divisors (1).

851346521791 is an equidigital number, since it uses as much as digits as its factorization.

851346521791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 52.

The spelling of 851346521791 in words is "eight hundred fifty-one billion, three hundred forty-six million, five hundred twenty-one thousand, seven hundred ninety-one".