11731698543 has 4 divisors (see below), whose sum is σ = 15642264728. Its totient is φ = 7821132360.

The previous prime is 11731698509. The next prime is 11731698569. The reversal of 11731698543 is 34589613711.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11731698543 - 2⁹ = 11731698031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11731698492 and 11731698501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11731698443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955283088 + ... + 1955283093.

It is an arithmetic number, because the mean of its divisors is an integer number (3910566182).

Almost surely, 2^11731698543 is an apocalyptic number.

11731698543 is a deficient number, since it is larger than the sum of its proper divisors (3910566185).

11731698543 is an equidigital number, since it uses as much as digits as its factorization.

11731698543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910566184.

The product of its digits is 544320, while the sum is 48.

The spelling of 11731698543 in words is "eleven billion, seven hundred thirty-one million, six hundred ninety-eight thousand, five hundred forty-three".