12471384978 has 24 divisors (see below), whose sum is σ = 29099898828. Its totient is φ = 3837349152.

The previous prime is 12471384931. The next prime is 12471384979. The reversal of 12471384978 is 87948317421.

12471384978 is a `hidden beast` number, since 1 + 2 + 471 + 3 + 84 + 97 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12102860169 + 368524809 = 110013^2 + 19197^2 .

It is not an unprimeable number, because it can be changed into a prime (12471384979) 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, 26648025 + ... + 26648492.

Almost surely, 2^12471384978 is an apocalyptic number.

12471384978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12471384978 is an abundant number, since it is smaller than the sum of its proper divisors (16628513850).

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

12471384978 is a wasteful number, since it uses less digits than its factorization.

12471384978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53296538 (or 53296535 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The spelling of 12471384978 in words is "twelve billion, four hundred seventy-one million, three hundred eighty-four thousand, nine hundred seventy-eight".