40055423161 has 4 divisors (see below), whose sum is σ = 43136609572. Its totient is φ = 36974236752.

The previous prime is 40055423131. The next prime is 40055423189. The reversal of 40055423161 is 16132455004.

It is a happy number.

40055423161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7330613161 + 32724810000 = 85619^2 + 180900^2 .

It is a cyclic number.

It is not a de Polignac number, because 40055423161 - 2⁵ = 40055423129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40055423101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540593186 + ... + 1540593211.

It is an arithmetic number, because the mean of its divisors is an integer number (10784152393).

Almost surely, 2^40055423161 is an apocalyptic number.

It is an amenable number.

40055423161 is a deficient number, since it is larger than the sum of its proper divisors (3081186411).

40055423161 is a wasteful number, since it uses less digits than its factorization.

40055423161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3081186410.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 40055423161 its reverse (16132455004), we get a palindrome (56187878165).

The spelling of 40055423161 in words is "forty billion, fifty-five million, four hundred twenty-three thousand, one hundred sixty-one".