42565441057 has 2 divisors, whose sum is σ = 42565441058. Its totient is φ = 42565441056.

The previous prime is 42565441003. The next prime is 42565441081. The reversal of 42565441057 is 75014456524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21861396736 + 20704044321 = 147856^2 + 143889^2 .

It is a cyclic number.

It is not a de Polignac number, because 42565441057 - 2¹¹ = 42565439009 is a prime.

It is not a weakly prime, because it can be changed into another prime (42565441357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21282720528 + 21282720529.

It is an arithmetic number, because the mean of its divisors is an integer number (21282720529).

Almost surely, 2^42565441057 is an apocalyptic number.

It is an amenable number.

42565441057 is a deficient number, since it is larger than the sum of its proper divisors (1).

42565441057 is an equidigital number, since it uses as much as digits as its factorization.

42565441057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672000, while the sum is 43.

The spelling of 42565441057 in words is "forty-two billion, five hundred sixty-five million, four hundred forty-one thousand, fifty-seven".