11977640844 has 24 divisors (see below), whose sum is σ = 30097662000. Its totient is φ = 3685427904.

The previous prime is 11977640837. The next prime is 11977640849. The reversal of 11977640844 is 44804677911.

It is a happy number.

11977640844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11977640849) 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 7 ways as a sum of consecutive naturals, for example, 38389719 + ... + 38390030.

It is an arithmetic number, because the mean of its divisors is an integer number (1254069250).

Almost surely, 2^11977640844 is an apocalyptic number.

It is an amenable number.

11977640844 is an abundant number, since it is smaller than the sum of its proper divisors (18120021156).

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

11977640844 is a wasteful number, since it uses less digits than its factorization.

11977640844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76779769 (or 76779767 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 11977640844 in words is "eleven billion, nine hundred seventy-seven million, six hundred forty thousand, eight hundred forty-four".