6118640917 has 2 divisors, whose sum is σ = 6118640918. Its totient is φ = 6118640916.

The previous prime is 6118640909. The next prime is 6118641007. The reversal of 6118640917 is 7190468116.

6118640917 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5167596996 + 951043921 = 71886^2 + 30839^2 .

It is a cyclic number.

It is not a de Polignac number, because 6118640917 - 2³ = 6118640909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6118640317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3059320458 + 3059320459.

It is an arithmetic number, because the mean of its divisors is an integer number (3059320459).

Almost surely, 2^6118640917 is an apocalyptic number.

It is an amenable number.

6118640917 is a deficient number, since it is larger than the sum of its proper divisors (1).

6118640917 is an equidigital number, since it uses as much as digits as its factorization.

6118640917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 6118640917 is about 78221.7419711425. The cubic root of 6118640917 is about 1829.0194431359.

The spelling of 6118640917 in words is "six billion, one hundred eighteen million, six hundred forty thousand, nine hundred seventeen".