4040193581 has 2 divisors, whose sum is σ = 4040193582. Its totient is φ = 4040193580.

The previous prime is 4040193559. The next prime is 4040193629. The reversal of 4040193581 is 1853910404.

4040193581 is digitally balanced in base 2, 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., 3889517956 + 150675625 = 62366^2 + 12275^2 .

It is a cyclic number.

It is not a de Polignac number, because 4040193581 - 2¹⁰ = 4040192557 is a prime.

It is a super-2 number, since 2×4040193581² = 32646328343907207122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4040193511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2020096790 + 2020096791.

It is an arithmetic number, because the mean of its divisors is an integer number (2020096791).

Almost surely, 2^4040193581 is an apocalyptic number.

It is an amenable number.

4040193581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040193581 is an equidigital number, since it uses as much as digits as its factorization.

4040193581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 4040193581 is about 63562.5171071757. The cubic root of 4040193581 is about 1592.7002862015.

The spelling of 4040193581 in words is "four billion, forty million, one hundred ninety-three thousand, five hundred eighty-one".