11532324781 has 4 divisors (see below), whose sum is σ = 11534740672. Its totient is φ = 11529908892.

The previous prime is 11532324751. The next prime is 11532324809. The reversal of 11532324781 is 18742323511.

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: 18742323511 = 31 ⋅604591081.

It is a cyclic number.

It is not a de Polignac number, because 11532324781 - 2¹⁷ = 11532193709 is a prime.

It is a super-2 number, since 2×11532324781² (a number of 21 digits) contains 22 as substring.

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 11532324781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11532324751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200771 + ... + 1210336.

It is an arithmetic number, because the mean of its divisors is an integer number (2883685168).

Almost surely, 2^11532324781 is an apocalyptic number.

It is an amenable number.

11532324781 is a deficient number, since it is larger than the sum of its proper divisors (2415891).

11532324781 is an equidigital number, since it uses as much as digits as its factorization.

11532324781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415890.

The product of its digits is 40320, while the sum is 37.

The spelling of 11532324781 in words is "eleven billion, five hundred thirty-two million, three hundred twenty-four thousand, seven hundred eighty-one".