12818651181940 has 48 divisors (see below), whose sum is σ = 28505097672912. Its totient is φ = 4825430378496.

The previous prime is 12818651181913. The next prime is 12818651181943. The reversal of 12818651181940 is 4918115681821.

12818651181940 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 8 ways, for example, as 956495736036 + 11862155445904 = 978006^2 + 3444148^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12818651181943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2355814 + ... + 5584546.

It is an arithmetic number, because the mean of its divisors is an integer number (593856201519).

Almost surely, 2^{12818651181940} is an apocalyptic number.

12818651181940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12818651181940 is an abundant number, since it is smaller than the sum of its proper divisors (15686446490972).

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

12818651181940 is a wasteful number, since it uses less digits than its factorization.

12818651181940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240436 (or 3240434 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 55.

The spelling of 12818651181940 in words is "twelve trillion, eight hundred eighteen billion, six hundred fifty-one million, one hundred eighty-one thousand, nine hundred forty".