11532306721 has 8 divisors (see below), whose sum is σ = 12847663080. Its totient is φ = 10278129792.

The previous prime is 11532306713. The next prime is 11532306781. The reversal of 11532306721 is 12760323511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1395844321 + 10136462400 = 37361^2 + 100680^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11532306721 - 2³ = 11532306713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11532306701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15294460 + ... + 15295213.

It is an arithmetic number, because the mean of its divisors is an integer number (1605957885).

Almost surely, 2^11532306721 is an apocalyptic number.

It is an amenable number.

11532306721 is a deficient number, since it is larger than the sum of its proper divisors (1315356359).

11532306721 is a wasteful number, since it uses less digits than its factorization.

11532306721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30589715.

The product of its (nonzero) digits is 7560, while the sum is 31.

The spelling of 11532306721 in words is "eleven billion, five hundred thirty-two million, three hundred six thousand, seven hundred twenty-one".