1280055187927 has 4 divisors (see below), whose sum is σ = 1282906090800. Its totient is φ = 1277204285056.

The previous prime is 1280055187891. The next prime is 1280055187973. The reversal of 1280055187927 is 7297815500821.

It is a happy number.

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 1280055187927 - 2²³ = 1280046799319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280055187997) 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, 1425450763 + ... + 1425451660.

It is an arithmetic number, because the mean of its divisors is an integer number (320726522700).

Almost surely, 2^{1280055187927} is an apocalyptic number.

1280055187927 is a deficient number, since it is larger than the sum of its proper divisors (2850902873).

1280055187927 is an equidigital number, since it uses as much as digits as its factorization.

1280055187927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2850902872.

The product of its (nonzero) digits is 2822400, while the sum is 55.

The spelling of 1280055187927 in words is "one trillion, two hundred eighty billion, fifty-five million, one hundred eighty-seven thousand, nine hundred twenty-seven".