42505384049 has 2 divisors, whose sum is σ = 42505384050. Its totient is φ = 42505384048.

The previous prime is 42505384027. The next prime is 42505384067. The reversal of 42505384049 is 94048350524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30461419024 + 12043965025 = 174532^2 + 109745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42505384049 is a prime.

It is not a weakly prime, because it can be changed into another prime (42505384849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21252692024 + 21252692025.

It is an arithmetic number, because the mean of its divisors is an integer number (21252692025).

Almost surely, 2^42505384049 is an apocalyptic number.

It is an amenable number.

42505384049 is a deficient number, since it is larger than the sum of its proper divisors (1).

42505384049 is an equidigital number, since it uses as much as digits as its factorization.

42505384049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 42505384049 in words is "forty-two billion, five hundred five million, three hundred eighty-four thousand, forty-nine".