1278494934927 has 16 divisors (see below), whose sum is σ = 1948926139392. Its totient is φ = 730289766240.

The previous prime is 1278494934797. The next prime is 1278494934947. The reversal of 1278494934927 is 7294394948721.

It is not a de Polignac number, because 1278494934927 - 2⁸ = 1278494934671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278494934947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11558983 + ... + 11669064.

It is an arithmetic number, because the mean of its divisors is an integer number (121807883712).

Almost surely, 2^{1278494934927} is an apocalyptic number.

1278494934927 is a deficient number, since it is larger than the sum of its proper divisors (670431204465).

1278494934927 is a wasteful number, since it uses less digits than its factorization.

1278494934927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23230678.

The product of its digits is 219469824, while the sum is 69.

The spelling of 1278494934927 in words is "one trillion, two hundred seventy-eight billion, four hundred ninety-four million, nine hundred thirty-four thousand, nine hundred twenty-seven".