12878449364 has 48 divisors (see below), whose sum is σ = 24704326080. Its totient is φ = 5825783040.

The previous prime is 12878449357. The next prime is 12878449379. The reversal of 12878449364 is 46394487821.

It is a happy number.

It is a super-2 number, since 2×12878449364² (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 15 ways as a sum of consecutive naturals, for example, 13513112 + ... + 13514064.

It is an arithmetic number, because the mean of its divisors is an integer number (514673460).

Almost surely, 2^12878449364 is an apocalyptic number.

It is an amenable number.

12878449364 is a deficient number, since it is larger than the sum of its proper divisors (11825876716).

12878449364 is a wasteful number, since it uses less digits than its factorization.

12878449364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120 (or 2118 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 56.

The spelling of 12878449364 in words is "twelve billion, eight hundred seventy-eight million, four hundred forty-nine thousand, three hundred sixty-four".