7155328865 has 32 divisors (see below), whose sum is σ = 9145633536. Its totient is φ = 5362156800.

The previous prime is 7155328847. The next prime is 7155328867. The reversal of 7155328865 is 5688235517.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-7155328865 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7155328867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6405287 + ... + 6406403.

It is an arithmetic number, because the mean of its divisors is an integer number (285801048).

Almost surely, 2^7155328865 is an apocalyptic number.

It is an amenable number.

7155328865 is a deficient number, since it is larger than the sum of its proper divisors (1990304671).

7155328865 is a wasteful number, since it uses less digits than its factorization.

7155328865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2249.

The product of its digits is 2016000, while the sum is 50.

The square root of 7155328865 is about 84589.1769968239. The cubic root of 7155328865 is about 1926.9770088551.

The spelling of 7155328865 in words is "seven billion, one hundred fifty-five million, three hundred twenty-eight thousand, eight hundred sixty-five".