12477691008 has 160 divisors (see below), whose sum is σ = 39318279660. Its totient is φ = 3914514432.

The previous prime is 12477690997. The next prime is 12477691021. The reversal of 12477691008 is 80019677421.

It is a happy number.

12477691008 is a `hidden beast` number, since 12 + 477 + 69 + 100 + 8 = 666.

12477691008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12151093824 + 326597184 = 110232^2 + 18072^2 .

It is a super-2 number, since 2×12477691008² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 140860 + ... + 211652.

Almost surely, 2^12477691008 is an apocalyptic number.

12477691008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12477691008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19659139830).

12477691008 is an abundant number, since it is smaller than the sum of its proper divisors (26840588652).

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

12477691008 is an equidigital number, since it uses as much as digits as its factorization.

12477691008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70836 (or 70815 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 12477691008 in words is "twelve billion, four hundred seventy-seven million, six hundred ninety-one thousand, eight".