8015861049 has 24 divisors (see below), whose sum is σ = 12527700768. Its totient is φ = 4545515520.

The previous prime is 8015861047. The next prime is 8015861059. The reversal of 8015861049 is 9401685108.

It is not a de Polignac number, because 8015861049 - 2¹ = 8015861047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8015861049.

It is not an unprimeable number, because it can be changed into a prime (8015861047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188872 + ... + 227385.

It is an arithmetic number, because the mean of its divisors is an integer number (521987532).

Almost surely, 2^8015861049 is an apocalyptic number.

It is an amenable number.

8015861049 is a deficient number, since it is larger than the sum of its proper divisors (4511839719).

8015861049 is a wasteful number, since it uses less digits than its factorization.

8015861049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416405 (or 416398 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 8015861049 is about 89531.3411549274. The cubic root of 8015861049 is about 2001.3208815273.

The spelling of 8015861049 in words is "eight billion, fifteen million, eight hundred sixty-one thousand, forty-nine".