11721796488 has 24 divisors (see below), whose sum is σ = 31746532350. Its totient is φ = 3907265472.

The previous prime is 11721796481. The next prime is 11721796519. The reversal of 11721796488 is 88469712711.

11721796488 is a `hidden beast` number, since 1 + 1 + 72 + 1 + 7 + 96 + 488 = 666.

11721796488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6260290884 + 5461505604 = 79122^2 + 73902^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (11721796481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81401293 + ... + 81401436.

Almost surely, 2^11721796488 is an apocalyptic number.

11721796488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11721796488 is an abundant number, since it is smaller than the sum of its proper divisors (20024735862).

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

11721796488 is a wasteful number, since it uses less digits than its factorization.

11721796488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162802741 (or 162802734 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The spelling of 11721796488 in words is "eleven billion, seven hundred twenty-one million, seven hundred ninety-six thousand, four hundred eighty-eight".