15535552543 has 4 divisors (see below), whose sum is σ = 17754917200. Its totient is φ = 13316187888.

The previous prime is 15535552541. The next prime is 15535552577. The reversal of 15535552543 is 34525553551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34525553551 = 1123 ⋅30744037.

It is a cyclic number.

It is not a de Polignac number, because 15535552543 - 2¹ = 15535552541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15535552543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15535552541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109682318 + ... + 1109682331.

It is an arithmetic number, because the mean of its divisors is an integer number (4438729300).

Almost surely, 2^15535552543 is an apocalyptic number.

15535552543 is a deficient number, since it is larger than the sum of its proper divisors (2219364657).

15535552543 is an equidigital number, since it uses as much as digits as its factorization.

15535552543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219364656.

The product of its digits is 1125000, while the sum is 43.

The spelling of 15535552543 in words is "fifteen billion, five hundred thirty-five million, five hundred fifty-two thousand, five hundred forty-three".