42344550557 has 2 divisors, whose sum is σ = 42344550558. Its totient is φ = 42344550556.

The previous prime is 42344550517. The next prime is 42344550559. The reversal of 42344550557 is 75505544324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41230926916 + 1113623641 = 203054^2 + 33371^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42344550557 is a prime.

Together with 42344550559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42344550559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21172275278 + 21172275279.

It is an arithmetic number, because the mean of its divisors is an integer number (21172275279).

Almost surely, 2^42344550557 is an apocalyptic number.

It is an amenable number.

42344550557 is a deficient number, since it is larger than the sum of its proper divisors (1).

42344550557 is an equidigital number, since it uses as much as digits as its factorization.

42344550557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680000, while the sum is 44.

The spelling of 42344550557 in words is "forty-two billion, three hundred forty-four million, five hundred fifty thousand, five hundred fifty-seven".