12846778840 has 96 divisors (see below), whose sum is σ = 34340137920. Its totient is φ = 4310863872.

The previous prime is 12846778831. The next prime is 12846778871. The reversal of 12846778840 is 4887764821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22392 + ... + 161848.

It is an arithmetic number, because the mean of its divisors is an integer number (357709770).

Almost surely, 2^12846778840 is an apocalyptic number.

12846778840 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 12846778840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17170068960).

12846778840 is an abundant number, since it is smaller than the sum of its proper divisors (21493359080).

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

12846778840 is a wasteful number, since it uses less digits than its factorization.

12846778840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139529 (or 139518 counting only the distinct ones).

The product of its (nonzero) digits is 4816896, while the sum is 55.

The spelling of 12846778840 in words is "twelve billion, eight hundred forty-six million, seven hundred seventy-eight thousand, eight hundred forty".