8105647049 has 2 divisors, whose sum is σ = 8105647050. Its totient is φ = 8105647048.

The previous prime is 8105646979. The next prime is 8105647093. The reversal of 8105647049 is 9407465018.

It is an a-pointer prime, because the next prime (8105647093) can be obtained adding 8105647049 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7587629449 + 518017600 = 87107^2 + 22760^2 .

It is a cyclic number.

It is not a de Polignac number, because 8105647049 - 2²⁸ = 7837211593 is a prime.

It is not a weakly prime, because it can be changed into another prime (8105644049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4052823524 + 4052823525.

It is an arithmetic number, because the mean of its divisors is an integer number (4052823525).

Almost surely, 2^8105647049 is an apocalyptic number.

It is an amenable number.

8105647049 is a deficient number, since it is larger than the sum of its proper divisors (1).

8105647049 is an equidigital number, since it uses as much as digits as its factorization.

8105647049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 8105647049 is about 90031.3670283863. The cubic root of 8105647049 is about 2008.7654480869.

The spelling of 8105647049 in words is "eight billion, one hundred five million, six hundred forty-seven thousand, forty-nine".