11572321280 has 264 divisors, whose sum is σ = 30967147008. Its totient is φ = 4124639232.

The previous prime is 11572321259. The next prime is 11572321289. The reversal of 11572321280 is 8212327511.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11572321289) 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 in 23 ways as a sum of consecutive naturals, for example, 91120577 + ... + 91120703.

Almost surely, 2^11572321280 is an apocalyptic number.

11572321280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11572321280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15483573504).

11572321280 is an abundant number, since it is smaller than the sum of its proper divisors (19394825728).

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

11572321280 is a wasteful number, since it uses less digits than its factorization.

11572321280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

Adding to 11572321280 its reverse (8212327511), we get a palindrome (19784648791).

The spelling of 11572321280 in words is "eleven billion, five hundred seventy-two million, three hundred twenty-one thousand, two hundred eighty".