40122742189 has 2 divisors, whose sum is σ = 40122742190. Its totient is φ = 40122742188.

The previous prime is 40122742181. The next prime is 40122742199. The reversal of 40122742189 is 98124722104.

40122742189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38592602500 + 1530139689 = 196450^2 + 39117^2 .

It is a cyclic number.

It is not a de Polignac number, because 40122742189 - 2³ = 40122742181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40122742181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20061371094 + 20061371095.

It is an arithmetic number, because the mean of its divisors is an integer number (20061371095).

Almost surely, 2^40122742189 is an apocalyptic number.

It is an amenable number.

40122742189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40122742189 is an equidigital number, since it uses as much as digits as its factorization.

40122742189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 40122742189 in words is "forty billion, one hundred twenty-two million, seven hundred forty-two thousand, one hundred eighty-nine".