2128276757 has 4 divisors (see below), whose sum is σ = 2130568620. Its totient is φ = 2125984896.

The previous prime is 2128276751. The next prime is 2128276769. The reversal of 2128276757 is 7576728212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1153213681 + 975063076 = 33959^2 + 31226^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128276757 - 2¹⁰ = 2128275733 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 (2128276751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1144538 + ... + 1146395.

It is an arithmetic number, because the mean of its divisors is an integer number (532642155).

Almost surely, 2^2128276757 is an apocalyptic number.

It is an amenable number.

2128276757 is a deficient number, since it is larger than the sum of its proper divisors (2291863).

2128276757 is an equidigital number, since it uses as much as digits as its factorization.

2128276757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291862.

The product of its digits is 658560, while the sum is 47.

The square root of 2128276757 is about 46133.2500155799. The cubic root of 2128276757 is about 1286.3012767377.

The spelling of 2128276757 in words is "two billion, one hundred twenty-eight million, two hundred seventy-six thousand, seven hundred fifty-seven".