12778724560 has 240 divisors, whose sum is σ = 37648947456. Its totient is φ = 3943120896.

The previous prime is 12778724549. The next prime is 12778724593. The reversal of 12778724560 is 6542787721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3720604 + ... + 3724036.

Almost surely, 2^12778724560 is an apocalyptic number.

12778724560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12778724560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18824473728).

12778724560 is an abundant number, since it is smaller than the sum of its proper divisors (24870222896).

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

12778724560 is a wasteful number, since it uses less digits than its factorization.

12778724560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510 (or 3487 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 12778724560 in words is "twelve billion, seven hundred seventy-eight million, seven hundred twenty-four thousand, five hundred sixty".