12878466487821 has 96 divisors (see below), whose sum is σ = 21334059626880. Its totient is φ = 7414944768000.

The previous prime is 12878466487813. The next prime is 12878466487837.

12878466487821 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 8 + 4 + 66 + 487 + 82 + 1 = 666.

12878466487821 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12878466487821 - 2³ = 12878466487813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12878466487821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12878466487871) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 499133121 + ... + 499158921.

It is an arithmetic number, because the mean of its divisors is an integer number (222229787780).

Almost surely, 2^{12878466487821} is an apocalyptic number.

12878466487821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12878466487821 is a deficient number, since it is larger than the sum of its proper divisors (8455593139059).

12878466487821 is a wasteful number, since it uses less digits than its factorization.

12878466487821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29067 (or 29064 counting only the distinct ones).

The product of its digits is 462422016, while the sum is 72.

The spelling of 12878466487821 in words is "twelve trillion, eight hundred seventy-eight billion, four hundred sixty-six million, four hundred eighty-seven thousand, eight hundred twenty-one".