8105647047 has 4 divisors (see below), whose sum is σ = 10807529400. Its totient is φ = 5403764696.

The previous prime is 8105646979. The next prime is 8105647049. The reversal of 8105647047 is 7407465018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8105647047 - 2¹⁶ = 8105581511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8105647049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350941172 + ... + 1350941177.

It is an arithmetic number, because the mean of its divisors is an integer number (2701882350).

Almost surely, 2^8105647047 is an apocalyptic number.

8105647047 is a deficient number, since it is larger than the sum of its proper divisors (2701882353).

8105647047 is a wasteful number, since it uses less digits than its factorization.

8105647047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701882352.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 8105647047 is about 90031.3670172790. The cubic root of 8105647047 is about 2008.7654479217.

The spelling of 8105647047 in words is "eight billion, one hundred five million, six hundred forty-seven thousand, forty-seven".