12780320296 has 8 divisors (see below), whose sum is σ = 23963100570. Its totient is φ = 6390160144.

The previous prime is 12780320291. The next prime is 12780320297. The reversal of 12780320296 is 69202308721.

It can be written as a sum of positive squares in only one way, i.e., 12744152100 + 36168196 = 112890^2 + 6014^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12780320291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798770011 + ... + 798770026.

Almost surely, 2^12780320296 is an apocalyptic number.

It is an amenable number.

12780320296 is a deficient number, since it is larger than the sum of its proper divisors (11182780274).

12780320296 is a wasteful number, since it uses less digits than its factorization.

12780320296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597540043 (or 1597540039 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 12780320296 in words is "twelve billion, seven hundred eighty million, three hundred twenty thousand, two hundred ninety-six".