15998343543 has 192 divisors, whose sum is σ = 30340710400. Its totient is φ = 8065516032.

The previous prime is 15998343499. The next prime is 15998343553. The reversal of 15998343543 is 34534389951.

15998343543 is a `hidden beast` number, since 1 + 5 + 9 + 98 + 3 + 4 + 3 + 543 = 666.

It is not a de Polignac number, because 15998343543 - 2¹⁴ = 15998327159 is a prime.

It is a super-2 number, since 2×15998343543² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15998343543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15998343553) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 125971146 + ... + 125971272.

Almost surely, 2^15998343543 is an apocalyptic number.

15998343543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

15998343543 is a deficient number, since it is larger than the sum of its proper divisors (14342366857).

15998343543 is a wasteful number, since it uses less digits than its factorization.

15998343543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 266 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The spelling of 15998343543 in words is "fifteen billion, nine hundred ninety-eight million, three hundred forty-three thousand, five hundred forty-three".