42268263649 has 2 divisors, whose sum is σ = 42268263650. Its totient is φ = 42268263648.

The previous prime is 42268263643. The next prime is 42268263659. The reversal of 42268263649 is 94636286224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42130436049 + 137827600 = 205257^2 + 11740^2 .

It is a cyclic number.

It is not a de Polignac number, because 42268263649 - 2¹¹ = 42268261601 is a prime.

It is a super-2 number, since 2×42268263649² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42268263596 and 42268263605.

It is not a weakly prime, because it can be changed into another prime (42268263643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21134131824 + 21134131825.

It is an arithmetic number, because the mean of its divisors is an integer number (21134131825).

Almost surely, 2^42268263649 is an apocalyptic number.

It is an amenable number.

42268263649 is a deficient number, since it is larger than the sum of its proper divisors (1).

42268263649 is an equidigital number, since it uses as much as digits as its factorization.

42268263649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5971968, while the sum is 52.

The spelling of 42268263649 in words is "forty-two billion, two hundred sixty-eight million, two hundred sixty-three thousand, six hundred forty-nine".