12705837328 has 10 divisors (see below), whose sum is σ = 24617559854. Its totient is φ = 6352918656.

The previous prime is 12705837299. The next prime is 12705837329. The reversal of 12705837328 is 82373850721.

It can be written as a sum of positive squares in only one way, i.e., 11361001744 + 1344835584 = 106588^2 + 36672^2 .

It is a super-2 number, since 2×12705837328² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12705837329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397057401 + ... + 397057432.

Almost surely, 2^12705837328 is an apocalyptic number.

It is an amenable number.

12705837328 is a deficient number, since it is larger than the sum of its proper divisors (11911722526).

12705837328 is an equidigital number, since it uses as much as digits as its factorization.

12705837328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794114841 (or 794114835 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 12705837328 in words is "twelve billion, seven hundred five million, eight hundred thirty-seven thousand, three hundred twenty-eight".