45450042109 has 2 divisors, whose sum is σ = 45450042110. Its totient is φ = 45450042108.

The previous prime is 45450042091. The next prime is 45450042119. The reversal of 45450042109 is 90124005454.

45450042109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (45450042091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25043062500 + 20406979609 = 158250^2 + 142853^2 .

It is a cyclic number.

It is not a de Polignac number, because 45450042109 - 2¹¹ = 45450040061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45450042119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22725021054 + 22725021055.

It is an arithmetic number, because the mean of its divisors is an integer number (22725021055).

Almost surely, 2^45450042109 is an apocalyptic number.

It is an amenable number.

45450042109 is a deficient number, since it is larger than the sum of its proper divisors (1).

45450042109 is an equidigital number, since it uses as much as digits as its factorization.

45450042109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 45450042109 in words is "forty-five billion, four hundred fifty million, forty-two thousand, one hundred nine".