7165791381 has 32 divisors (see below), whose sum is σ = 11405721600. Its totient is φ = 3912695424.

The previous prime is 7165791371. The next prime is 7165791403. The reversal of 7165791381 is 1831975617.

It is not a de Polignac number, because 7165791381 - 2⁹ = 7165790869 is a prime.

It is a super-2 number, since 2×7165791381² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7165791381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7165791371) 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 31 ways as a sum of consecutive naturals, for example, 499596 + ... + 513738.

It is an arithmetic number, because the mean of its divisors is an integer number (356428800).

Almost surely, 2^7165791381 is an apocalyptic number.

It is an amenable number.

7165791381 is a deficient number, since it is larger than the sum of its proper divisors (4239930219).

7165791381 is a wasteful number, since it uses less digits than its factorization.

7165791381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15225.

The product of its digits is 317520, while the sum is 48.

The square root of 7165791381 is about 84650.9975192260. The cubic root of 7165791381 is about 1927.9157595243.

The spelling of 7165791381 in words is "seven billion, one hundred sixty-five million, seven hundred ninety-one thousand, three hundred eighty-one".