11554938543 has 16 divisors (see below), whose sum is σ = 16273427456. Its totient is φ = 7281429120.

The previous prime is 11554938533. The next prime is 11554938547. The reversal of 11554938543 is 34583945511.

It is not a de Polignac number, because 11554938543 - 2²² = 11550744239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11554938492 and 11554938501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11554938547) 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, 1440730 + ... + 1448727.

It is an arithmetic number, because the mean of its divisors is an integer number (1017089216).

Almost surely, 2^11554938543 is an apocalyptic number.

11554938543 is a deficient number, since it is larger than the sum of its proper divisors (4718488913).

11554938543 is a wasteful number, since it uses less digits than its factorization.

11554938543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889534.

The product of its digits is 1296000, while the sum is 48.

The spelling of 11554938543 in words is "eleven billion, five hundred fifty-four million, nine hundred thirty-eight thousand, five hundred forty-three".