15663724133 has 2 divisors, whose sum is σ = 15663724134. Its totient is φ = 15663724132.

The previous prime is 15663724081. The next prime is 15663724147. The reversal of 15663724133 is 33142736651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10837226404 + 4826497729 = 104102^2 + 69473^2 .

It is a cyclic number.

It is not a de Polignac number, because 15663724133 - 2⁸ = 15663723877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15663724183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7831862066 + 7831862067.

It is an arithmetic number, because the mean of its divisors is an integer number (7831862067).

Almost surely, 2^15663724133 is an apocalyptic number.

It is an amenable number.

15663724133 is a deficient number, since it is larger than the sum of its proper divisors (1).

15663724133 is an equidigital number, since it uses as much as digits as its factorization.

15663724133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 41.

The spelling of 15663724133 in words is "fifteen billion, six hundred sixty-three million, seven hundred twenty-four thousand, one hundred thirty-three".