15380820063 has 24 divisors (see below), whose sum is σ = 25908740000. Its totient is φ = 8789038272.

The previous prime is 15380820031. The next prime is 15380820079. The reversal of 15380820063 is 36002808351.

15380820063 is a `hidden beast` number, since 15 + 380 + 8 + 200 + 63 = 666.

15380820063 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15380820063 - 2⁵ = 15380820031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15380810063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2488138 + ... + 2494311.

Almost surely, 2^15380820063 is an apocalyptic number.

15380820063 is a deficient number, since it is larger than the sum of its proper divisors (10527919937).

15380820063 is an equidigital number, since it uses as much as digits as its factorization.

15380820063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982476 (or 4982459 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 15380820063 in words is "fifteen billion, three hundred eighty million, eight hundred twenty thousand, sixty-three".