11543321801 has 4 divisors (see below), whose sum is σ = 12592714704. Its totient is φ = 10493928900.

The previous prime is 11543321773. The next prime is 11543321843. The reversal of 11543321801 is 10812334511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10812334511 = 11 ⋅982939501.

It is a cyclic number.

It is not a de Polignac number, because 11543321801 - 2⁶ = 11543321737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11543321201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524696435 + ... + 524696456.

It is an arithmetic number, because the mean of its divisors is an integer number (3148178676).

Almost surely, 2^11543321801 is an apocalyptic number.

11543321801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11543321801 is a deficient number, since it is larger than the sum of its proper divisors (1049392903).

11543321801 is a wasteful number, since it uses less digits than its factorization.

11543321801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049392902.

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 11543321801 in words is "eleven billion, five hundred forty-three million, three hundred twenty-one thousand, eight hundred one".