11551323016 has 8 divisors (see below), whose sum is σ = 21658730670. Its totient is φ = 5775661504.

The previous prime is 11551322999. The next prime is 11551323019. The reversal of 11551323016 is 61032315511.

It can be written as a sum of positive squares in only one way, i.e., 9430352100 + 2120970916 = 97110^2 + 46054^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (11551323019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721957681 + ... + 721957696.

Almost surely, 2^11551323016 is an apocalyptic number.

It is an amenable number.

11551323016 is a deficient number, since it is larger than the sum of its proper divisors (10107407654).

11551323016 is a wasteful number, since it uses less digits than its factorization.

11551323016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443915383 (or 1443915379 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

Adding to 11551323016 its reverse (61032315511), we get a palindrome (72583638527).

The spelling of 11551323016 in words is "eleven billion, five hundred fifty-one million, three hundred twenty-three thousand, sixteen".