7158007865 has 16 divisors (see below), whose sum is σ = 8684015616. Its totient is φ = 5663592000.

The previous prime is 7158007789. The next prime is 7158007867. The reversal of 7158007865 is 5687008517.

It is a happy number.

It is not a de Polignac number, because 7158007865 - 2¹⁶ = 7157942329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7158007867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493304 + ... + 507606.

It is an arithmetic number, because the mean of its divisors is an integer number (542750976).

Almost surely, 2^7158007865 is an apocalyptic number.

It is an amenable number.

7158007865 is a deficient number, since it is larger than the sum of its proper divisors (1526007751).

7158007865 is a wasteful number, since it uses less digits than its factorization.

7158007865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15400.

The product of its (nonzero) digits is 470400, while the sum is 47.

The square root of 7158007865 is about 84605.0108740611. The cubic root of 7158007865 is about 1927.2174696064.

The spelling of 7158007865 in words is "seven billion, one hundred fifty-eight million, seven thousand, eight hundred sixty-five".