12752161997 has 4 divisors (see below), whose sum is σ = 12806892540. Its totient is φ = 12697431456.

The previous prime is 12752161979. The next prime is 12752162041. The reversal of 12752161997 is 79916125721.

12752161997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1314715081 + 11437446916 = 36259^2 + 106946^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12752161997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12752161927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27364922 + ... + 27365387.

It is an arithmetic number, because the mean of its divisors is an integer number (3201723135).

Almost surely, 2^12752161997 is an apocalyptic number.

It is an amenable number.

12752161997 is a deficient number, since it is larger than the sum of its proper divisors (54730543).

12752161997 is an equidigital number, since it uses as much as digits as its factorization.

12752161997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54730542.

The product of its digits is 476280, while the sum is 50.

The spelling of 12752161997 in words is "twelve billion, seven hundred fifty-two million, one hundred sixty-one thousand, nine hundred ninety-seven".