42635253779 has 2 divisors, whose sum is σ = 42635253780. Its totient is φ = 42635253778.

The previous prime is 42635253767. The next prime is 42635253917. The reversal of 42635253779 is 97735253624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42635253779 - 2⁴ = 42635253763 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42635253779.

It is not a weakly prime, because it can be changed into another prime (42635253719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21317626889 + 21317626890.

It is an arithmetic number, because the mean of its divisors is an integer number (21317626890).

Almost surely, 2^42635253779 is an apocalyptic number.

42635253779 is a deficient number, since it is larger than the sum of its proper divisors (1).

42635253779 is an equidigital number, since it uses as much as digits as its factorization.

42635253779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9525600, while the sum is 53.

The spelling of 42635253779 in words is "forty-two billion, six hundred thirty-five million, two hundred fifty-three thousand, seven hundred seventy-nine".