40340121138 has 12 divisors (see below), whose sum is σ = 87403595838. Its totient is φ = 13446707040.

The previous prime is 40340121137. The next prime is 40340121167. The reversal of 40340121138 is 83112104304.

40340121138 is a `hidden beast` number, since 40 + 3 + 401 + 211 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40339517409 + 603729 = 200847^2 + 777^2 .

It is not an unprimeable number, because it can be changed into a prime (40340121137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1120558903 + ... + 1120558938.

Almost surely, 2^40340121138 is an apocalyptic number.

40340121138 is an abundant number, since it is smaller than the sum of its proper divisors (47063474700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40340121138 is a wasteful number, since it uses less digits than its factorization.

40340121138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241117849 (or 2241117846 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 40340121138 in words is "forty billion, three hundred forty million, one hundred twenty-one thousand, one hundred thirty-eight".