51656577265 has 16 divisors (see below), whose sum is σ = 64209808080. Its totient is φ = 39847736320.

The previous prime is 51656577257. The next prime is 51656577337. The reversal of 51656577265 is 56277565615.

It can be written as a sum of positive squares in 8 ways, for example, as 4669945569 + 46986631696 = 68337^2 + 216764^2 .

It is not a de Polignac number, because 51656577265 - 2³ = 51656577257 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 123724 + ... + 344413.

It is an arithmetic number, because the mean of its divisors is an integer number (4013113005).

Almost surely, 2^51656577265 is an apocalyptic number.

It is an amenable number.

51656577265 is a deficient number, since it is larger than the sum of its proper divisors (12553230815).

51656577265 is a wasteful number, since it uses less digits than its factorization.

51656577265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468932.

The product of its digits is 13230000, while the sum is 55.

The spelling of 51656577265 in words is "fifty-one billion, six hundred fifty-six million, five hundred seventy-seven thousand, two hundred sixty-five".