11539054321 has 4 divisors (see below), whose sum is σ = 11850920692. Its totient is φ = 11227187952.

The previous prime is 11539054279. The next prime is 11539054361. The reversal of 11539054321 is 12345093511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12345093511 = 2843 ⋅4342277.

It can be written as a sum of positive squares in 2 ways, for example, as 5430068721 + 6108985600 = 73689^2 + 78160^2 .

It is a cyclic number.

It is not a de Polignac number, because 11539054321 - 2²⁷ = 11404836593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11539054361) 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, 155933130 + ... + 155933203.

It is an arithmetic number, because the mean of its divisors is an integer number (2962730173).

Almost surely, 2^11539054321 is an apocalyptic number.

It is an amenable number.

11539054321 is a deficient number, since it is larger than the sum of its proper divisors (311866371).

11539054321 is an equidigital number, since it uses as much as digits as its factorization.

11539054321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311866370.

The product of its (nonzero) digits is 16200, while the sum is 34.

It can be divided in two parts, 115390543 and 21, that added together give a square (115390564 = 10742²).

The spelling of 11539054321 in words is "eleven billion, five hundred thirty-nine million, fifty-four thousand, three hundred twenty-one".