12851820788 has 12 divisors (see below), whose sum is σ = 22514695812. Its totient is φ = 6419050560.

The previous prime is 12851820739. The next prime is 12851820797. The reversal of 12851820788 is 88702815821.

It can be written as a sum of positive squares in 2 ways, for example, as 5187168484 + 7664652304 = 72022^2 + 87548^2 .

It is a congruent number.

It is an unprimeable number.

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, 1710743 + ... + 1718238.

It is an arithmetic number, because the mean of its divisors is an integer number (1876224651).

Almost surely, 2^12851820788 is an apocalyptic number.

It is an amenable number.

12851820788 is a deficient number, since it is larger than the sum of its proper divisors (9662875024).

12851820788 is a wasteful number, since it uses less digits than its factorization.

12851820788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429922 (or 3429920 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 50.

The spelling of 12851820788 in words is "twelve billion, eight hundred fifty-one million, eight hundred twenty thousand, seven hundred eighty-eight".