40019060581 has 2 divisors, whose sum is σ = 40019060582. Its totient is φ = 40019060580.

The previous prime is 40019060569. The next prime is 40019060659. The reversal of 40019060581 is 18506091004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39916443681 + 102616900 = 199791^2 + 10130^2 .

It is a cyclic number.

It is not a de Polignac number, because 40019060581 - 2⁷ = 40019060453 is a prime.

It is a super-2 number, since 2×40019060581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40019160581) 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, 20009530290 + 20009530291.

It is an arithmetic number, because the mean of its divisors is an integer number (20009530291).

Almost surely, 2^40019060581 is an apocalyptic number.

It is an amenable number.

40019060581 is a deficient number, since it is larger than the sum of its proper divisors (1).

40019060581 is an equidigital number, since it uses as much as digits as its factorization.

40019060581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 40019060581 in words is "forty billion, nineteen million, sixty thousand, five hundred eighty-one".