42520354663 has 2 divisors, whose sum is σ = 42520354664. Its totient is φ = 42520354662.

The previous prime is 42520354637. The next prime is 42520354691. The reversal of 42520354663 is 36645302524.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42520354663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42520354363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260177331 + 21260177332.

It is an arithmetic number, because the mean of its divisors is an integer number (21260177332).

Almost surely, 2^42520354663 is an apocalyptic number.

42520354663 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520354663 is an equidigital number, since it uses as much as digits as its factorization.

42520354663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 40.

The spelling of 42520354663 in words is "forty-two billion, five hundred twenty million, three hundred fifty-four thousand, six hundred sixty-three".