42401563291 has 2 divisors, whose sum is σ = 42401563292. Its totient is φ = 42401563290.

The previous prime is 42401563261. The next prime is 42401563301. The reversal of 42401563291 is 19236510424.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42401563291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42401563291.

It is not a weakly prime, because it can be changed into another prime (42401563261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200781645 + 21200781646.

It is an arithmetic number, because the mean of its divisors is an integer number (21200781646).

Almost surely, 2^42401563291 is an apocalyptic number.

42401563291 is a deficient number, since it is larger than the sum of its proper divisors (1).

42401563291 is an equidigital number, since it uses as much as digits as its factorization.

42401563291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 42401563291 in words is "forty-two billion, four hundred one million, five hundred sixty-three thousand, two hundred ninety-one".