1312786438819 has 4 divisors (see below), whose sum is σ = 1369864110096. Its totient is φ = 1255708767544.

The previous prime is 1312786438807. The next prime is 1312786438837. The reversal of 1312786438819 is 9188346872131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312786438819 - 2⁹ = 1312786438307 is a prime.

It is a super-2 number, since 2×1312786438819² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312786438519) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 28538835604 + ... + 28538835649.

It is an arithmetic number, because the mean of its divisors is an integer number (342466027524).

Almost surely, 2^{1312786438819} is an apocalyptic number.

1312786438819 is a deficient number, since it is larger than the sum of its proper divisors (57077671277).

1312786438819 is an equidigital number, since it uses as much as digits as its factorization.

1312786438819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57077671276.

The product of its digits is 13934592, while the sum is 61.

The spelling of 1312786438819 in words is "one trillion, three hundred twelve billion, seven hundred eighty-six million, four hundred thirty-eight thousand, eight hundred nineteen".