11572331328 has 70 divisors (see below), whose sum is σ = 34304030706. Its totient is φ = 3857442048.

The previous prime is 11572331263. The next prime is 11572331339. The reversal of 11572331328 is 82313327511.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6903615744 + 4668715584 = 83088^2 + 68328^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 11572331292 and 11572331301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1110975 + ... + 1121342.

Almost surely, 2^11572331328 is an apocalyptic number.

11572331328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11572331328 is an abundant number, since it is smaller than the sum of its proper divisors (22731699378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11572331328 is an equidigital number, since it uses as much as digits as its factorization.

11572331328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232341 (or 2232322 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

Adding to 11572331328 its reverse (82313327511), we get a palindrome (93885658839).

The spelling of 11572331328 in words is "eleven billion, five hundred seventy-two million, three hundred thirty-one thousand, three hundred twenty-eight".