42401437709 has 2 divisors, whose sum is σ = 42401437710. Its totient is φ = 42401437708.

The previous prime is 42401437697. The next prime is 42401437751. The reversal of 42401437709 is 90773410424.

42401437709 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., 26645665225 + 15755772484 = 163235^2 + 125522^2 .

It is a cyclic number.

It is not a de Polignac number, because 42401437709 - 2²⁸ = 42133002253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42401437789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200718854 + 21200718855.

It is an arithmetic number, because the mean of its divisors is an integer number (21200718855).

Almost surely, 2^42401437709 is an apocalyptic number.

It is an amenable number.

42401437709 is a deficient number, since it is larger than the sum of its proper divisors (1).

42401437709 is an equidigital number, since it uses as much as digits as its factorization.

42401437709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 42401437709 in words is "forty-two billion, four hundred one million, four hundred thirty-seven thousand, seven hundred nine".