15664450543 has 16 divisors (see below), whose sum is σ = 18524151360. Its totient is φ = 12960460800.

The previous prime is 15664450493. The next prime is 15664450591. The reversal of 15664450543 is 34505446651.

It is a de Polignac number, because none of the positive numbers 2^k-15664450543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15664450543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15664450343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1158703 + ... + 1172143.

It is an arithmetic number, because the mean of its divisors is an integer number (1157759460).

Almost surely, 2^15664450543 is an apocalyptic number.

15664450543 is a deficient number, since it is larger than the sum of its proper divisors (2859700817).

15664450543 is a wasteful number, since it uses less digits than its factorization.

15664450543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19218.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 15664450543 in words is "fifteen billion, six hundred sixty-four million, four hundred fifty thousand, five hundred forty-three".