12157752757 has 4 divisors (see below), whose sum is σ = 12219467436. Its totient is φ = 12096038080.

The previous prime is 12157752743. The next prime is 12157752779. The reversal of 12157752757 is 75725775121.

12157752757 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, and also an emirpimes, since its reverse is a distinct semiprime: 75725775121 = 227 ⋅333593723.

It can be written as a sum of positive squares in 2 ways, for example, as 12067901316 + 89851441 = 109854^2 + 9479^2 .

It is a cyclic number.

It is not a de Polignac number, because 12157752757 - 2¹⁹ = 12157228469 is a prime.

It is a super-2 number, since 2×12157752757² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12157752757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157752727) 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, 30857044 + ... + 30857437.

It is an arithmetic number, because the mean of its divisors is an integer number (3054866859).

Almost surely, 2^12157752757 is an apocalyptic number.

It is an amenable number.

12157752757 is a deficient number, since it is larger than the sum of its proper divisors (61714679).

12157752757 is an equidigital number, since it uses as much as digits as its factorization.

12157752757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61714678.

The product of its digits is 1200500, while the sum is 49.

The spelling of 12157752757 in words is "twelve billion, one hundred fifty-seven million, seven hundred fifty-two thousand, seven hundred fifty-seven".