85036667161 has 2 divisors, whose sum is σ = 85036667162. Its totient is φ = 85036667160.

The previous prime is 85036667059. The next prime is 85036667203. The reversal of 85036667161 is 16176663058.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57813317136 + 27223350025 = 240444^2 + 164995^2 .

It is a cyclic number.

It is not a de Polignac number, because 85036667161 - 2²⁵ = 85003112729 is a prime.

It is not a weakly prime, because it can be changed into another prime (85036664161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42518333580 + 42518333581.

It is an arithmetic number, because the mean of its divisors is an integer number (42518333581).

Almost surely, 2^85036667161 is an apocalyptic number.

It is an amenable number.

85036667161 is a deficient number, since it is larger than the sum of its proper divisors (1).

85036667161 is an equidigital number, since it uses as much as digits as its factorization.

85036667161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 85036667161 in words is "eighty-five billion, thirty-six million, six hundred sixty-seven thousand, one hundred sixty-one".