12960228649 has 3 divisors (see below), whose sum is σ = 12960342493. Its totient is φ = 12960114806.

The previous prime is 12960228641. The next prime is 12960228661. The reversal of 12960228649 is 94682206921.

The square root of 12960228649 is 113843.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 12960228649 - 2³ = 12960228641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12960228641) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 56922 + ... + 170764.

Almost surely, 2^12960228649 is an apocalyptic number.

12960228649 is the 113843-rd square number.

12960228649 is the 56922-nd centered octagonal number.

It is an amenable number.

12960228649 is a deficient number, since it is larger than the sum of its proper divisors (113844).

12960228649 is an frugal number, since it uses more digits than its factorization.

12960228649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227686 (or 113843 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

Multiplying 12960228649 by its sum of digits (49), we get a square (635051203801 = 796901²).

The spelling of 12960228649 in words is "twelve billion, nine hundred sixty million, two hundred twenty-eight thousand, six hundred forty-nine".