15821480863 has 2 divisors, whose sum is σ = 15821480864. Its totient is φ = 15821480862.

The previous prime is 15821480821. The next prime is 15821480897. The reversal of 15821480863 is 36808412851.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15821480863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15821480663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7910740431 + 7910740432.

It is an arithmetic number, because the mean of its divisors is an integer number (7910740432).

Almost surely, 2^15821480863 is an apocalyptic number.

15821480863 is a deficient number, since it is larger than the sum of its proper divisors (1).

15821480863 is an equidigital number, since it uses as much as digits as its factorization.

15821480863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 15821480863 in words is "fifteen billion, eight hundred twenty-one million, four hundred eighty thousand, eight hundred sixty-three".