15664452647 has 16 divisors (see below), whose sum is σ = 16709255424. Its totient is φ = 14633520000.

The previous prime is 15664452589. The next prime is 15664452649. The reversal of 15664452647 is 74625446651.

15664452647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 15664452647 - 2¹⁶ = 15664387111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15664452595 and 15664452604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15664452649) 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 15 ways as a sum of consecutive naturals, for example, 6187772 + ... + 6190302.

It is an arithmetic number, because the mean of its divisors is an integer number (1044328464).

Almost surely, 2^15664452647 is an apocalyptic number.

15664452647 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

15664452647 is a deficient number, since it is larger than the sum of its proper divisors (1044802777).

15664452647 is a wasteful number, since it uses less digits than its factorization.

15664452647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110.

The product of its digits is 4838400, while the sum is 50.

The spelling of 15664452647 in words is "fifteen billion, six hundred sixty-four million, four hundred fifty-two thousand, six hundred forty-seven".