851381746559 has 2 divisors, whose sum is σ = 851381746560. Its totient is φ = 851381746558.

The previous prime is 851381746541. The next prime is 851381746561. The reversal of 851381746559 is 955647183158.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851381746559 is a prime.

Together with 851381746561, 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 (851381746529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425690873279 + 425690873280.

It is an arithmetic number, because the mean of its divisors is an integer number (425690873280).

Almost surely, 2^851381746559 is an apocalyptic number.

851381746559 is a deficient number, since it is larger than the sum of its proper divisors (1).

851381746559 is an equidigital number, since it uses as much as digits as its factorization.

851381746559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288000, while the sum is 62.

The spelling of 851381746559 in words is "eight hundred fifty-one billion, three hundred eighty-one million, seven hundred forty-six thousand, five hundred fifty-nine".