11533256449 has 27 divisors (see below), whose sum is σ = 13745523267. Its totient is φ = 9665370000.

The previous prime is 11533256437. The next prime is 11533256473. The reversal of 11533256449 is 94465233511.

The square root of 11533256449 is 107393.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1706103025 + 9827153424 = 41305^2 + 99132^2 .

It is not a de Polignac number, because 11533256449 - 2¹¹ = 11533254401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11533256429) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15356824 + ... + 15357574.

Almost surely, 2^11533256449 is an apocalyptic number.

11533256449 is the 107393-rd square number.

11533256449 is the 53697-th centered octagonal number.

It is an amenable number.

11533256449 is a deficient number, since it is larger than the sum of its proper divisors (2212266818).

11533256449 is an frugal number, since it uses more digits than its factorization.

11533256449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550 (or 775 counting only the distinct ones).

The product of its digits is 388800, while the sum is 43.

The spelling of 11533256449 in words is "eleven billion, five hundred thirty-three million, two hundred fifty-six thousand, four hundred forty-nine".