1277891375275 has 12 divisors (see below), whose sum is σ = 1585996368952. Its totient is φ = 1021402736640.

The previous prime is 1277891375231. The next prime is 1277891375281. The reversal of 1277891375275 is 5725731987721.

It is not a de Polignac number, because 1277891375275 - 2³³ = 1269301440683 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22730454 + ... + 22786603.

Almost surely, 2^{1277891375275} is an apocalyptic number.

1277891375275 is a deficient number, since it is larger than the sum of its proper divisors (308104993677).

1277891375275 is a wasteful number, since it uses less digits than its factorization.

1277891375275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45518190 (or 45518185 counting only the distinct ones).

The product of its digits is 51861600, while the sum is 64.

The spelling of 1277891375275 in words is "one trillion, two hundred seventy-seven billion, eight hundred ninety-one million, three hundred seventy-five thousand, two hundred seventy-five".