11808156488 has 36 divisors (see below), whose sum is σ = 22417434585. Its totient is φ = 5831082144.

The previous prime is 11808156487. The next prime is 11808156511. The reversal of 11808156488 is 88465180811.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 11785707844 + 22448644 = 108562^2 + 4738^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=76838.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11808156487) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 31657070 + ... + 31657442.

Almost surely, 2^11808156488 is an apocalyptic number.

It is an amenable number.

11808156488 is a deficient number, since it is larger than the sum of its proper divisors (10609278097).

11808156488 is an frugal number, since it uses more digits than its factorization.

11808156488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 50.

Multiplying 11808156488 by its sum of digits (50), we get a square (590407824400 = 768380²).

The spelling of 11808156488 in words is "eleven billion, eight hundred eight million, one hundred fifty-six thousand, four hundred eighty-eight".