12781936734 has 32 divisors (see below), whose sum is σ = 29228795136. Its totient is φ = 3650364480.

The previous prime is 12781936733. The next prime is 12781936753. The reversal of 12781936734 is 43763918721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12781936733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30229 + ... + 162719.

It is an arithmetic number, because the mean of its divisors is an integer number (913399848).

Almost surely, 2^12781936734 is an apocalyptic number.

12781936734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12781936734 is an abundant number, since it is smaller than the sum of its proper divisors (16446858402).

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

12781936734 is a wasteful number, since it uses less digits than its factorization.

12781936734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134800.

The product of its digits is 1524096, while the sum is 51.

The spelling of 12781936734 in words is "twelve billion, seven hundred eighty-one million, nine hundred thirty-six thousand, seven hundred thirty-four".