12918878040 has 32 divisors (see below), whose sum is σ = 38756634480. Its totient is φ = 3445034112.

The previous prime is 12918878029. The next prime is 12918878041. The reversal of 12918878040 is 4087881921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12918878041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53828539 + ... + 53828778.

Almost surely, 2^12918878040 is an apocalyptic number.

12918878040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12918878040 is an abundant number, since it is smaller than the sum of its proper divisors (25837756440).

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

12918878040 is a wasteful number, since it uses less digits than its factorization.

12918878040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107657331 (or 107657327 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The spelling of 12918878040 in words is "twelve billion, nine hundred eighteen million, eight hundred seventy-eight thousand, forty".