6171170861 has 2 divisors, whose sum is σ = 6171170862. Its totient is φ = 6171170860.

The previous prime is 6171170857. The next prime is 6171170879. The reversal of 6171170861 is 1680711716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6053773636 + 117397225 = 77806^2 + 10835^2 .

It is a cyclic number.

It is not a de Polignac number, because 6171170861 - 2² = 6171170857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6171170821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3085585430 + 3085585431.

It is an arithmetic number, because the mean of its divisors is an integer number (3085585431).

Almost surely, 2^6171170861 is an apocalyptic number.

It is an amenable number.

6171170861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6171170861 is an equidigital number, since it uses as much as digits as its factorization.

6171170861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 6171170861 is about 78556.8002212412. The cubic root of 6171170861 is about 1834.2387199185.

The spelling of 6171170861 in words is "six billion, one hundred seventy-one million, one hundred seventy thousand, eight hundred sixty-one".