12381556826 has 8 divisors (see below), whose sum is σ = 19004250144. Its totient is φ = 6046806780.

The previous prime is 12381556823. The next prime is 12381556843. The reversal of 12381556826 is 62865518321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12381556823) 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 3 ways as a sum of consecutive naturals, for example, 71985710 + ... + 71985881.

It is an arithmetic number, because the mean of its divisors is an integer number (2375531268).

Almost surely, 2^12381556826 is an apocalyptic number.

12381556826 is a deficient number, since it is larger than the sum of its proper divisors (6622693318).

12381556826 is a wasteful number, since it uses less digits than its factorization.

12381556826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143971636.

The product of its digits is 691200, while the sum is 47.

The spelling of 12381556826 in words is "twelve billion, three hundred eighty-one million, five hundred fifty-six thousand, eight hundred twenty-six".