12767008538 has 4 divisors (see below), whose sum is σ = 19150512810. Its totient is φ = 6383504268.

The previous prime is 12767008519. The next prime is 12767008543. The reversal of 12767008538 is 83580076721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83580076721 = 205949 ⋅405829.

It can be written as a sum of positive squares in only one way, i.e., 8762270449 + 4004738089 = 93607^2 + 63283^2 .

It is a super-3 number, since 3×12767008538³ (a number of 31 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12767008492 and 12767008501.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3191752133 + ... + 3191752136.

Almost surely, 2^12767008538 is an apocalyptic number.

12767008538 is a deficient number, since it is larger than the sum of its proper divisors (6383504272).

12767008538 is an equidigital number, since it uses as much as digits as its factorization.

12767008538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383504271.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 12767008538 in words is "twelve billion, seven hundred sixty-seven million, eight thousand, five hundred thirty-eight".