7172580581 has 2 divisors, whose sum is σ = 7172580582. Its totient is φ = 7172580580.

The previous prime is 7172580563. The next prime is 7172580593. The reversal of 7172580581 is 1850852717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7088124481 + 84456100 = 84191^2 + 9190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7172580581 is a prime.

It is a super-2 number, since 2×7172580581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7172580281) 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 as a sum of consecutive naturals, namely, 3586290290 + 3586290291.

It is an arithmetic number, because the mean of its divisors is an integer number (3586290291).

Almost surely, 2^7172580581 is an apocalyptic number.

It is an amenable number.

7172580581 is a deficient number, since it is larger than the sum of its proper divisors (1).

7172580581 is an equidigital number, since it uses as much as digits as its factorization.

7172580581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156800, while the sum is 44.

The square root of 7172580581 is about 84691.0891475603. The cubic root of 7172580581 is about 1928.5244326605.

The spelling of 7172580581 in words is "seven billion, one hundred seventy-two million, five hundred eighty thousand, five hundred eighty-one".