56757128266 has 8 divisors (see below), whose sum is σ = 88071406020. Its totient is φ = 27399992928.

The previous prime is 56757128213. The next prime is 56757128269. The reversal of 56757128266 is 66282175765.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56308917025 + 448211241 = 237295^2 + 21171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (56757128269) 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, 489285531 + ... + 489285646.

Almost surely, 2^56757128266 is an apocalyptic number.

56757128266 is a deficient number, since it is larger than the sum of its proper divisors (31314277754).

56757128266 is a wasteful number, since it uses less digits than its factorization.

56757128266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978571208.

The product of its digits is 8467200, while the sum is 55.

The spelling of 56757128266 in words is "fifty-six billion, seven hundred fifty-seven million, one hundred twenty-eight thousand, two hundred sixty-six".