811105906619 has 2 divisors, whose sum is σ = 811105906620. Its totient is φ = 811105906618.

The previous prime is 811105906609. The next prime is 811105906687. The reversal of 811105906619 is 916609501118.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811105906619 is a prime.

It is a super-2 number, since 2×811105906619² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (811105906609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405552953309 + 405552953310.

It is an arithmetic number, because the mean of its divisors is an integer number (405552953310).

Almost surely, 2^811105906619 is an apocalyptic number.

811105906619 is a deficient number, since it is larger than the sum of its proper divisors (1).

811105906619 is an equidigital number, since it uses as much as digits as its factorization.

811105906619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 47.

The spelling of 811105906619 in words is "eight hundred eleven billion, one hundred five million, nine hundred six thousand, six hundred nineteen".