12811985297 has 4 divisors (see below), whose sum is σ = 13369028160. Its totient is φ = 12254942436.

The previous prime is 12811985293. The next prime is 12811985353. The reversal of 12811985297 is 79258911821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12811985297 - 2² = 12811985293 is a prime.

It is a super-3 number, since 3×12811985297³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12811985293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278521397 + ... + 278521442.

It is an arithmetic number, because the mean of its divisors is an integer number (3342257040).

Almost surely, 2^12811985297 is an apocalyptic number.

It is an amenable number.

12811985297 is a deficient number, since it is larger than the sum of its proper divisors (557042863).

12811985297 is an equidigital number, since it uses as much as digits as its factorization.

12811985297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557042862.

The product of its digits is 725760, while the sum is 53.

The spelling of 12811985297 in words is "twelve billion, eight hundred eleven million, nine hundred eighty-five thousand, two hundred ninety-seven".