12747784340 has 12 divisors (see below), whose sum is σ = 26770347156. Its totient is φ = 5099113728.

The previous prime is 12747784267. The next prime is 12747784397. The reversal of 12747784340 is 4348774721.

It can be written as a sum of positive squares in 2 ways, for example, as 4769007364 + 7978776976 = 69058^2 + 89324^2 .

It is a congruent number.

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, 318694589 + ... + 318694628.

It is an arithmetic number, because the mean of its divisors is an integer number (2230862263).

Almost surely, 2^12747784340 is an apocalyptic number.

12747784340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12747784340 is an abundant number, since it is smaller than the sum of its proper divisors (14022562816).

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

12747784340 is a wasteful number, since it uses less digits than its factorization.

12747784340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637389226 (or 637389224 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 47.

The spelling of 12747784340 in words is "twelve billion, seven hundred forty-seven million, seven hundred eighty-four thousand, three hundred forty".