7168020581 has 2 divisors, whose sum is σ = 7168020582. Its totient is φ = 7168020580.

The previous prime is 7168020569. The next prime is 7168020631. The reversal of 7168020581 is 1850208617.

7168020581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4767902500 + 2400118081 = 69050^2 + 48991^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7168020581 is a prime.

It is a super-2 number, since 2×7168020581² (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 (7168020551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3584010290 + 3584010291.

It is an arithmetic number, because the mean of its divisors is an integer number (3584010291).

Almost surely, 2^7168020581 is an apocalyptic number.

It is an amenable number.

7168020581 is a deficient number, since it is larger than the sum of its proper divisors (1).

7168020581 is an equidigital number, since it uses as much as digits as its factorization.

7168020581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 7168020581 is about 84664.1634990862. The cubic root of 7168020581 is about 1928.1156566933.

The spelling of 7168020581 in words is "seven billion, one hundred sixty-eight million, twenty thousand, five hundred eighty-one".