1279727276667 has 32 divisors (see below), whose sum is σ = 2054863564800. Its totient is φ = 692052929568.

The previous prime is 1279727276623. The next prime is 1279727276689. The reversal of 1279727276667 is 7666727279721.

It is not a de Polignac number, because 1279727276667 - 2¹⁰ = 1279727275643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1279727276617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1315567 + ... + 2071272.

It is an arithmetic number, because the mean of its divisors is an integer number (64214486400).

Almost surely, 2^{1279727276667} is an apocalyptic number.

1279727276667 is a deficient number, since it is larger than the sum of its proper divisors (775136288133).

1279727276667 is a wasteful number, since it uses less digits than its factorization.

1279727276667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387815.

The product of its digits is 261382464, while the sum is 69.

The spelling of 1279727276667 in words is "one trillion, two hundred seventy-nine billion, seven hundred twenty-seven million, two hundred seventy-six thousand, six hundred sixty-seven".