40010681 has 2 divisors, whose sum is σ = 40010682. Its totient is φ = 40010680.

The previous prime is 40010671. The next prime is 40010699. The reversal of 40010681 is 18601004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30151081 + 9859600 = 5491^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 40010681 - 2¹⁰ = 40009657 is a prime.

It is a super-2 number, since 2×40010681² = 3201709188167522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40010611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20005340 + 20005341.

It is an arithmetic number, because the mean of its divisors is an integer number (20005341).

Almost surely, 2^40010681 is an apocalyptic number.

It is an amenable number.

40010681 is a deficient number, since it is larger than the sum of its proper divisors (1).

40010681 is an equidigital number, since it uses as much as digits as its factorization.

40010681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 40010681 is about 6325.3996711670. The cubic root of 40010681 is about 342.0256270481.

Adding to 40010681 its reverse (18601004), we get a palindrome (58611685).

The spelling of 40010681 in words is "forty million, ten thousand, six hundred eighty-one".