12978894264 has 64 divisors (see below), whose sum is σ = 37270886400. Its totient is φ = 3689422464.

The previous prime is 12978894259. The next prime is 12978894287. The reversal of 12978894264 is 46249887921.

It is a junction number, because it is equal to n+sod(n) for n = 12978894198 and 12978894207.

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, 162984 + ... + 229175.

It is an arithmetic number, because the mean of its divisors is an integer number (582357600).

Almost surely, 2^12978894264 is an apocalyptic number.

12978894264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12978894264 is an abundant number, since it is smaller than the sum of its proper divisors (24291992136).

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

12978894264 is a wasteful number, since it uses less digits than its factorization.

12978894264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392372 (or 392368 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 60.

The spelling of 12978894264 in words is "twelve billion, nine hundred seventy-eight million, eight hundred ninety-four thousand, two hundred sixty-four".