40681161 has 6 divisors (see below), whose sum is σ = 58761690. Its totient is φ = 27120768.

The previous prime is 40681159. The next prime is 40681169. The reversal of 40681161 is 16118604.

It can be written as a sum of positive squares in only one way, i.e., 26842761 + 13838400 = 5181^2 + 3720^2 .

It is not a de Polignac number, because 40681161 - 2¹ = 40681159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40681169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2260056 + ... + 2260073.

It is an arithmetic number, because the mean of its divisors is an integer number (9793615).

Almost surely, 2^40681161 is an apocalyptic number.

It is an amenable number.

40681161 is a deficient number, since it is larger than the sum of its proper divisors (18080529).

40681161 is a wasteful number, since it uses less digits than its factorization.

40681161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4520135 (or 4520132 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 40681161 is about 6378.1785017354. The cubic root of 40681161 is about 343.9255545817.

Adding to 40681161 its reverse (16118604), we get a palindrome (56799765).

The spelling of 40681161 in words is "forty million, six hundred eighty-one thousand, one hundred sixty-one".