42343311509 has 2 divisors, whose sum is σ = 42343311510. Its totient is φ = 42343311508.

The previous prime is 42343311503. The next prime is 42343311529. The reversal of 42343311509 is 90511334324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32437090609 + 9906220900 = 180103^2 + 99530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42343311509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42343311503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21171655754 + 21171655755.

It is an arithmetic number, because the mean of its divisors is an integer number (21171655755).

Almost surely, 2^42343311509 is an apocalyptic number.

It is an amenable number.

42343311509 is a deficient number, since it is larger than the sum of its proper divisors (1).

42343311509 is an equidigital number, since it uses as much as digits as its factorization.

42343311509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 42343311509 in words is "forty-two billion, three hundred forty-three million, three hundred eleven thousand, five hundred nine".