12397475808 has 72 divisors (see below), whose sum is σ = 35275791096. Its totient is φ = 4130092800.

The previous prime is 12397475803. The next prime is 12397475861. The reversal of 12397475808 is 80857479321.

It is a happy number.

12397475808 is a `hidden beast` number, since 1 + 2 + 3 + 97 + 475 + 80 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12397475803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 524403 + ... + 547533.

It is an arithmetic number, because the mean of its divisors is an integer number (489941543).

Almost surely, 2^12397475808 is an apocalyptic number.

12397475808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12397475808 is an abundant number, since it is smaller than the sum of its proper divisors (22878315288).

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

12397475808 is a wasteful number, since it uses less digits than its factorization.

12397475808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25008 (or 24997 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 12397475808 in words is "twelve billion, three hundred ninety-seven million, four hundred seventy-five thousand, eight hundred eight".