1279395479547 has 12 divisors (see below), whose sum is σ = 1895409417720. Its totient is φ = 852926401440.

The previous prime is 1279395479521. The next prime is 1279395479561. The reversal of 1279395479547 is 7459745939721.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1279395479547 is a `hidden beast` number, since 1 + 2 + 7 + 9 + 3 + 9 + 5 + 4 + 79 + 547 = 666.

It is not a de Polignac number, because 1279395479547 - 2¹⁹ = 1279394955259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1279395479147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5768547 + ... + 5986227.

It is an arithmetic number, because the mean of its divisors is an integer number (157950784810).

Almost surely, 2^{1279395479547} is an apocalyptic number.

1279395479547 is a deficient number, since it is larger than the sum of its proper divisors (616013938173).

1279395479547 is an frugal number, since it uses more digits than its factorization.

1279395479547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435371 (or 217684 counting only the distinct ones).

The product of its digits is 600112800, while the sum is 72.

The spelling of 1279395479547 in words is "one trillion, two hundred seventy-nine billion, three hundred ninety-five million, four hundred seventy-nine thousand, five hundred forty-seven".