851765912071 has 2 divisors, whose sum is σ = 851765912072. Its totient is φ = 851765912070.

The previous prime is 851765911901. The next prime is 851765912113. The reversal of 851765912071 is 170219567158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 851765912071 - 2⁹ = 851765911559 is a prime.

It is a super-2 number, since 2×851765912071² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851765312071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425882956035 + 425882956036.

It is an arithmetic number, because the mean of its divisors is an integer number (425882956036).

Almost surely, 2^851765912071 is an apocalyptic number.

851765912071 is a deficient number, since it is larger than the sum of its proper divisors (1).

851765912071 is an equidigital number, since it uses as much as digits as its factorization.

851765912071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 52.

The spelling of 851765912071 in words is "eight hundred fifty-one billion, seven hundred sixty-five million, nine hundred twelve thousand, seventy-one".