851021164448759 has 2 divisors, whose sum is σ = 851021164448760. Its totient is φ = 851021164448758.

The previous prime is 851021164448747. The next prime is 851021164448797. The reversal of 851021164448759 is 957844461120158.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851021164448759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 851021164448695 and 851021164448704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851021164448159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425510582224379 + 425510582224380.

It is an arithmetic number, because the mean of its divisors is an integer number (425510582224380).

Almost surely, 2^{851021164448759} is an apocalyptic number.

851021164448759 is a deficient number, since it is larger than the sum of its proper divisors (1).

851021164448759 is an equidigital number, since it uses as much as digits as its factorization.

851021164448759 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77414400, while the sum is 65.

The spelling of 851021164448759 in words is "eight hundred fifty-one trillion, twenty-one billion, one hundred sixty-four million, four hundred forty-eight thousand, seven hundred fifty-nine".