12861753820 has 12 divisors (see below), whose sum is σ = 27009683064. Its totient is φ = 5144701520.

The previous prime is 12861753713. The next prime is 12861753851. The reversal of 12861753820 is 2835716821.

It is a super-2 number, since 2×12861753820² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321543826 + ... + 321543865.

It is an arithmetic number, because the mean of its divisors is an integer number (2250806922).

Almost surely, 2^12861753820 is an apocalyptic number.

12861753820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12861753820 is an abundant number, since it is smaller than the sum of its proper divisors (14147929244).

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

12861753820 is a wasteful number, since it uses less digits than its factorization.

12861753820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643087700 (or 643087698 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 12861753820 in words is "twelve billion, eight hundred sixty-one million, seven hundred fifty-three thousand, eight hundred twenty".