40180681 has 8 divisors (see below), whose sum is σ = 41760000. Its totient is φ = 38619120.

The previous prime is 40180669. The next prime is 40180691. The reversal of 40180681 is 18608104.

40180681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40180681 is a prime.

It is a super-2 number, since 2×40180681² = 3228974251247522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40180691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270 + ... + 8968.

It is an arithmetic number, because the mean of its divisors is an integer number (5220000).

Almost surely, 2^40180681 is an apocalyptic number.

It is an amenable number.

40180681 is a deficient number, since it is larger than the sum of its proper divisors (1579319).

40180681 is a wasteful number, since it uses less digits than its factorization.

40180681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8879.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 40180681 is about 6338.8233135181. The cubic root of 40180681 is about 342.5093495592.

Adding to 40180681 its reverse (18608104), we get a palindrome (58788785).

The spelling of 40180681 in words is "forty million, one hundred eighty thousand, six hundred eighty-one".