1275506531055 has 48 divisors (see below), whose sum is σ = 2217059185536. Its totient is φ = 678369761280.

The previous prime is 1275506530967. The next prime is 1275506531063. The reversal of 1275506531055 is 5501356055721.

1275506531055 is a `hidden beast` number, since 1 + 2 + 7 + 550 + 65 + 31 + 0 + 5 + 5 = 666.

It is not a de Polignac number, because 1275506531055 - 2¹⁰ = 1275506530031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1275506531055.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44070369 + ... + 44099301.

It is an arithmetic number, because the mean of its divisors is an integer number (46188733032).

Almost surely, 2^{1275506531055} is an apocalyptic number.

1275506531055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1275506531055 is a deficient number, since it is larger than the sum of its proper divisors (941552654481).

1275506531055 is a wasteful number, since it uses less digits than its factorization.

1275506531055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31648 (or 31645 counting only the distinct ones).

The product of its (nonzero) digits is 787500, while the sum is 45.

The spelling of 1275506531055 in words is "one trillion, two hundred seventy-five billion, five hundred six million, five hundred thirty-one thousand, fifty-five".