6851686013761 has 2 divisors, whose sum is σ = 6851686013762. Its totient is φ = 6851686013760.

The previous prime is 6851686013737. The next prime is 6851686013803. The reversal of 6851686013761 is 1673106861586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5397537027600 + 1454148986161 = 2323260^2 + 1205881^2 .

It is a cyclic number.

It is not a de Polignac number, because 6851686013761 - 2¹⁷ = 6851685882689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6851686013696 and 6851686013705.

It is not a weakly prime, because it can be changed into another prime (6851686010761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3425843006880 + 3425843006881.

It is an arithmetic number, because the mean of its divisors is an integer number (3425843006881).

Almost surely, 2^{6851686013761} is an apocalyptic number.

It is an amenable number.

6851686013761 is a deficient number, since it is larger than the sum of its proper divisors (1).

6851686013761 is an equidigital number, since it uses as much as digits as its factorization.

6851686013761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 6851686013761 in words is "six trillion, eight hundred fifty-one billion, six hundred eighty-six million, thirteen thousand, seven hundred sixty-one".