12578887856 has 20 divisors (see below), whose sum is σ = 25157776704. Its totient is φ = 6086558400.

The previous prime is 12578887831. The next prime is 12578887879. The reversal of 12578887856 is 65878887521.

12578887856 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 12578887792 and 12578887801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12679835 + ... + 12680826.

Almost surely, 2^12578887856 is an apocalyptic number.

12578887856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12578887856 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12578887856 is a wasteful number, since it uses less digits than its factorization.

12578887856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25360700 (or 25360694 counting only the distinct ones).

The product of its digits is 60211200, while the sum is 65.

The spelling of 12578887856 in words is "twelve billion, five hundred seventy-eight million, eight hundred eighty-seven thousand, eight hundred fifty-six".