12774247720 has 64 divisors (see below), whose sum is σ = 31227048720. Its totient is φ = 4674883584.

The previous prime is 12774247693. The next prime is 12774247723. The reversal of 12774247720 is 2774247721.

It can be written as a sum of positive squares in 8 ways, for example, as 1179396 + 12773068324 = 1086^2 + 113018^2 .

It is not an unprimeable number, because it can be changed into a prime (12774247723) 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, 49939 + ... + 167458.

Almost surely, 2^12774247720 is an apocalyptic number.

12774247720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12774247720 is an abundant number, since it is smaller than the sum of its proper divisors (18452801000).

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

12774247720 is a wasteful number, since it uses less digits than its factorization.

12774247720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217534 (or 217530 counting only the distinct ones).

The product of its (nonzero) digits is 307328, while the sum is 43.

Subtracting from 12774247720 its reverse (2774247721), we obtain a palindrome (9999999999).

The spelling of 12774247720 in words is "twelve billion, seven hundred seventy-four million, two hundred forty-seven thousand, seven hundred twenty".