12818075749 has 4 divisors (see below), whose sum is σ = 12833576064. Its totient is φ = 12802575436.

The previous prime is 12818075737. The next prime is 12818075761. The reversal of 12818075749 is 94757081821.

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 an interprime number because it is at equal distance from previous prime (12818075737) and next prime (12818075761).

It is a cyclic number.

It is not a de Polignac number, because 12818075749 - 2¹¹ = 12818073701 is a prime.

It is a super-2 number, since 2×12818075749² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12818075696 and 12818075705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12818075449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7748917 + ... + 7750570.

It is an arithmetic number, because the mean of its divisors is an integer number (3208394016).

Almost surely, 2^12818075749 is an apocalyptic number.

It is an amenable number.

12818075749 is a deficient number, since it is larger than the sum of its proper divisors (15500315).

12818075749 is an equidigital number, since it uses as much as digits as its factorization.

12818075749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15500314.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 12818075749 in words is "twelve billion, eight hundred eighteen million, seventy-five thousand, seven hundred forty-nine".