40605330161 has 24 divisors (see below), whose sum is σ = 47297175912. Its totient is φ = 34713536000.

The previous prime is 40605330137. The next prime is 40605330173. The reversal of 40605330161 is 16103350604.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6798991936 + 33806338225 = 82456^2 + 183865^2 .

It is not a de Polignac number, because 40605330161 - 2³⁴ = 23425460977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40605330131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2668571 + ... + 2683743.

It is an arithmetic number, because the mean of its divisors is an integer number (1970715663).

Almost surely, 2^40605330161 is an apocalyptic number.

It is an amenable number.

40605330161 is a deficient number, since it is larger than the sum of its proper divisors (6691845751).

40605330161 is a wasteful number, since it uses less digits than its factorization.

40605330161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16513 (or 16502 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 40605330161 its reverse (16103350604), we get a palindrome (56708680765).

The spelling of 40605330161 in words is "forty billion, six hundred five million, three hundred thirty thousand, one hundred sixty-one".