11581977488 has 30 divisors (see below), whose sum is σ = 22647614262. Its totient is φ = 5737473280.

The previous prime is 11581977467. The next prime is 11581977521. The reversal of 11581977488 is 88477918511.

11581977488 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., 6559704064 + 5022273424 = 80992^2 + 70868^2 .

It is an unprimeable number.

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, 4574783 + ... + 4577313.

Almost surely, 2^11581977488 is an apocalyptic number.

It is an amenable number.

11581977488 is a deficient number, since it is larger than the sum of its proper divisors (11065636774).

11581977488 is an frugal number, since it uses more digits than its factorization.

11581977488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183 (or 2646 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 59.

The spelling of 11581977488 in words is "eleven billion, five hundred eighty-one million, nine hundred seventy-seven thousand, four hundred eighty-eight".