15663506063 has 2 divisors, whose sum is σ = 15663506064. Its totient is φ = 15663506062.

The previous prime is 15663506039. The next prime is 15663506081. The reversal of 15663506063 is 36060536651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15663506063 - 2¹⁴ = 15663489679 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 15663506063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15663506003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7831753031 + 7831753032.

It is an arithmetic number, because the mean of its divisors is an integer number (7831753032).

Almost surely, 2^15663506063 is an apocalyptic number.

15663506063 is a deficient number, since it is larger than the sum of its proper divisors (1).

15663506063 is an equidigital number, since it uses as much as digits as its factorization.

15663506063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 41.

The spelling of 15663506063 in words is "fifteen billion, six hundred sixty-three million, five hundred six thousand, sixty-three".