12785243878 has 12 divisors (see below), whose sum is σ = 20922176052. Its totient is φ = 5811233420.

The previous prime is 12785243869. The next prime is 12785243881. The reversal of 12785243878 is 87834258721.

It is a super-2 number, since 2×12785243878² (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 5 ways as a sum of consecutive naturals, for example, 518301 + ... + 542407.

It is an arithmetic number, because the mean of its divisors is an integer number (1743514671).

Almost surely, 2^12785243878 is an apocalyptic number.

12785243878 is a deficient number, since it is larger than the sum of its proper divisors (8136932174).

12785243878 is an frugal number, since it uses more digits than its factorization.

12785243878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48227 (or 24120 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 55.

The spelling of 12785243878 in words is "twelve billion, seven hundred eighty-five million, two hundred forty-three thousand, eight hundred seventy-eight".