12756526819 has 4 divisors (see below), whose sum is σ = 12758078896. Its totient is φ = 12754974744.

The previous prime is 12756526813. The next prime is 12756526829. The reversal of 12756526819 is 91862565721.

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: 91862565721 = 53 ⋅1733255957.

It is a cyclic number.

It is not a de Polignac number, because 12756526819 - 2²⁵ = 12722972387 is a prime.

It is a super-2 number, since 2×12756526819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12756526813) 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, 763644 + ... + 780169.

It is an arithmetic number, because the mean of its divisors is an integer number (3189519724).

Almost surely, 2^12756526819 is an apocalyptic number.

12756526819 is a deficient number, since it is larger than the sum of its proper divisors (1552077).

12756526819 is an equidigital number, since it uses as much as digits as its factorization.

12756526819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552076.

The product of its digits is 1814400, while the sum is 52.

The spelling of 12756526819 in words is "twelve billion, seven hundred fifty-six million, five hundred twenty-six thousand, eight hundred nineteen".