42236708909 has 2 divisors, whose sum is σ = 42236708910. Its totient is φ = 42236708908.

The previous prime is 42236708861. The next prime is 42236708951. The reversal of 42236708909 is 90980763224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35674898884 + 6561810025 = 188878^2 + 81005^2 .

It is a cyclic number.

It is not a de Polignac number, because 42236708909 - 2⁸ = 42236708653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42236708999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21118354454 + 21118354455.

It is an arithmetic number, because the mean of its divisors is an integer number (21118354455).

Almost surely, 2^42236708909 is an apocalyptic number.

It is an amenable number.

42236708909 is a deficient number, since it is larger than the sum of its proper divisors (1).

42236708909 is an equidigital number, since it uses as much as digits as its factorization.

42236708909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 42236708909 in words is "forty-two billion, two hundred thirty-six million, seven hundred eight thousand, nine hundred nine".