861153442117 has 2 divisors, whose sum is σ = 861153442118. Its totient is φ = 861153442116.

The previous prime is 861153442063. The next prime is 861153442141. The reversal of 861153442117 is 711244351168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 860690374756 + 463067361 = 927734^2 + 21519^2 .

It is a cyclic number.

It is not a de Polignac number, because 861153442117 - 2¹⁵ = 861153409349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861153442417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430576721058 + 430576721059.

It is an arithmetic number, because the mean of its divisors is an integer number (430576721059).

Almost surely, 2^861153442117 is an apocalyptic number.

It is an amenable number.

861153442117 is a deficient number, since it is larger than the sum of its proper divisors (1).

861153442117 is an equidigital number, since it uses as much as digits as its factorization.

861153442117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The spelling of 861153442117 in words is "eight hundred sixty-one billion, one hundred fifty-three million, four hundred forty-two thousand, one hundred seventeen".