13501506563 has 2 divisors, whose sum is σ = 13501506564. Its totient is φ = 13501506562.

The previous prime is 13501506523. The next prime is 13501506617. The reversal of 13501506563 is 36560510531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13501506563 - 2²² = 13497312259 is a prime.

It is not a weakly prime, because it can be changed into another prime (13501506523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6750753281 + 6750753282.

It is an arithmetic number, because the mean of its divisors is an integer number (6750753282).

Almost surely, 2^13501506563 is an apocalyptic number.

13501506563 is a deficient number, since it is larger than the sum of its proper divisors (1).

13501506563 is an equidigital number, since it uses as much as digits as its factorization.

13501506563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 35.

The spelling of 13501506563 in words is "thirteen billion, five hundred one million, five hundred six thousand, five hundred sixty-three".