11662521233 has 18 divisors (see below), whose sum is σ = 13529386962. Its totient is φ = 10044239040.

The previous prime is 11662521223. The next prime is 11662521257. The reversal of 11662521233 is 33212526611.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9772706449 + 1889814784 = 98857^2 + 43472^2 .

It is not a de Polignac number, because 11662521233 - 2¹⁰ = 11662520209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11662521233.

It is not an unprimeable number, because it can be changed into a prime (11662521223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 89816 + ... + 177177.

It is an arithmetic number, because the mean of its divisors is an integer number (751632609).

Almost surely, 2^11662521233 is an apocalyptic number.

It is an amenable number.

11662521233 is a deficient number, since it is larger than the sum of its proper divisors (1866865729).

11662521233 is a wasteful number, since it uses less digits than its factorization.

11662521233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267053 (or 267023 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The spelling of 11662521233 in words is "eleven billion, six hundred sixty-two million, five hundred twenty-one thousand, two hundred thirty-three".