12878466487820 has 12 divisors (see below), whose sum is σ = 27044779624464. Its totient is φ = 5151386595120.

The previous prime is 12878466487813. The next prime is 12878466487837. The reversal of 12878466487820 is 2878466487821.

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, 321961662176 + ... + 321961662215.

It is an arithmetic number, because the mean of its divisors is an integer number (2253731635372).

Almost surely, 2^{12878466487820} is an apocalyptic number.

12878466487820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12878466487820 is an abundant number, since it is smaller than the sum of its proper divisors (14166313136644).

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

12878466487820 is a wasteful number, since it uses less digits than its factorization.

12878466487820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643923324400 (or 643923324398 counting only the distinct ones).

The product of its (nonzero) digits is 462422016, while the sum is 71.

Subtracting from 12878466487820 its reverse (2878466487821), we obtain a palindrome (9999999999999).

The spelling of 12878466487820 in words is "twelve trillion, eight hundred seventy-eight billion, four hundred sixty-six million, four hundred eighty-seven thousand, eight hundred twenty".