11978115912 has 48 divisors (see below), whose sum is σ = 37075122240. Its totient is φ = 3422318688.

The previous prime is 11978115899. The next prime is 11978115917. The reversal of 11978115912 is 21951187911.

11978115912 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 (11978115917) 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 11 ways as a sum of consecutive naturals, for example, 11882548 + ... + 11883555.

It is an arithmetic number, because the mean of its divisors is an integer number (772398380).

Almost surely, 2^11978115912 is an apocalyptic number.

11978115912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11978115912 is an abundant number, since it is smaller than the sum of its proper divisors (25097006328).

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

11978115912 is a wasteful number, since it uses less digits than its factorization.

11978115912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23766122 (or 23766115 counting only the distinct ones).

The product of its digits is 45360, while the sum is 45.

The spelling of 11978115912 in words is "eleven billion, nine hundred seventy-eight million, one hundred fifteen thousand, nine hundred twelve".