7165867281 has 64 divisors (see below), whose sum is σ = 10387353600. Its totient is φ = 4383878400.

The previous prime is 7165867277. The next prime is 7165867283. The reversal of 7165867281 is 1827685617.

It is a happy number.

It is not a de Polignac number, because 7165867281 - 2² = 7165867277 is a prime.

It is a super-2 number, since 2×7165867281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7165867283) 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 in 63 ways as a sum of consecutive naturals, for example, 48092995 + ... + 48093143.

It is an arithmetic number, because the mean of its divisors is an integer number (162302400).

Almost surely, 2^7165867281 is an apocalyptic number.

It is an amenable number.

7165867281 is a deficient number, since it is larger than the sum of its proper divisors (3221486319).

7165867281 is a wasteful number, since it uses less digits than its factorization.

7165867281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446.

The product of its digits is 1128960, while the sum is 51.

The square root of 7165867281 is about 84651.4458293537. The cubic root of 7165867281 is about 1927.9225663226.

The spelling of 7165867281 in words is "seven billion, one hundred sixty-five million, eight hundred sixty-seven thousand, two hundred eighty-one".