275128512813 has 128 divisors (see below), whose sum is σ = 526934937600. Its totient is φ = 137670624000.

The previous prime is 275128512809. The next prime is 275128512833. The reversal of 275128512813 is 318215821572.

275128512813 is a `hidden beast` number, since 2 + 7 + 5 + 128 + 512 + 8 + 1 + 3 = 666.

It is not a de Polignac number, because 275128512813 - 2² = 275128512809 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275128512803) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 26703763 + ... + 26714063.

It is an arithmetic number, because the mean of its divisors is an integer number (4116679200).

Almost surely, 2^275128512813 is an apocalyptic number.

It is an amenable number.

275128512813 is a deficient number, since it is larger than the sum of its proper divisors (251806424787).

275128512813 is a wasteful number, since it uses less digits than its factorization.

275128512813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10800 (or 10794 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The spelling of 275128512813 in words is "two hundred seventy-five billion, one hundred twenty-eight million, five hundred twelve thousand, eight hundred thirteen".