12780156336 has 20 divisors (see below), whose sum is σ = 33015403992. Its totient is φ = 4260052096.

The previous prime is 12780156307. The next prime is 12780156353. The reversal of 12780156336 is 63365108721.

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, 133126581 + ... + 133126676.

Almost surely, 2^12780156336 is an apocalyptic number.

12780156336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12780156336 is an abundant number, since it is smaller than the sum of its proper divisors (20235247656).

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

12780156336 is a wasteful number, since it uses less digits than its factorization.

12780156336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266253268 (or 266253262 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 12780156336 in words is "twelve billion, seven hundred eighty million, one hundred fifty-six thousand, three hundred thirty-six".