6105865991 has 2 divisors, whose sum is σ = 6105865992. Its totient is φ = 6105865990.

The previous prime is 6105865981. The next prime is 6105866003. The reversal of 6105865991 is 1995685016.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6105865991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6105865981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3052932995 + 3052932996.

It is an arithmetic number, because the mean of its divisors is an integer number (3052932996).

Almost surely, 2^6105865991 is an apocalyptic number.

6105865991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6105865991 is an equidigital number, since it uses as much as digits as its factorization.

6105865991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 50.

The square root of 6105865991 is about 78140.0408945375. The cubic root of 6105865991 is about 1827.7456380169.

The spelling of 6105865991 in words is "six billion, one hundred five million, eight hundred sixty-five thousand, nine hundred ninety-one".