6172561111117 has 2 divisors, whose sum is σ = 6172561111118. Its totient is φ = 6172561111116.

The previous prime is 6172561111061. The next prime is 6172561111121. The reversal of 6172561111117 is 7111111652716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5352994831716 + 819566279401 = 2313654^2 + 905299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6172561111117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6172561111117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6172561121117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3086280555558 + 3086280555559.

It is an arithmetic number, because the mean of its divisors is an integer number (3086280555559).

Almost surely, 2^{6172561111117} is an apocalyptic number.

It is an amenable number.

6172561111117 is a deficient number, since it is larger than the sum of its proper divisors (1).

6172561111117 is an equidigital number, since it uses as much as digits as its factorization.

6172561111117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 40.

The spelling of 6172561111117 in words is "six trillion, one hundred seventy-two billion, five hundred sixty-one million, one hundred eleven thousand, one hundred seventeen".