6105109991 has 2 divisors, whose sum is σ = 6105109992. Its totient is φ = 6105109990.

The previous prime is 6105109987. The next prime is 6105109993. The reversal of 6105109991 is 1999015016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6105109991 - 2² = 6105109987 is a prime.

Together with 6105109993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6105109993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3052554995 + 3052554996.

It is an arithmetic number, because the mean of its divisors is an integer number (3052554996).

Almost surely, 2^6105109991 is an apocalyptic number.

6105109991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6105109991 is an equidigital number, since it uses as much as digits as its factorization.

6105109991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870, while the sum is 41.

The square root of 6105109991 is about 78135.2032761162. The cubic root of 6105109991 is about 1827.6702005749.

The spelling of 6105109991 in words is "six billion, one hundred five million, one hundred nine thousand, nine hundred ninety-one".