51528792681 has 8 divisors (see below), whose sum is σ = 76338952160. Its totient is φ = 34352528436.

The previous prime is 51528792673. The next prime is 51528792713. The reversal of 51528792681 is 18629782515.

51528792681 is a `hidden beast` number, since 51 + 528 + 7 + 9 + 2 + 68 + 1 = 666.

It is not a de Polignac number, because 51528792681 - 2³ = 51528792673 is a prime.

It is a super-2 number, since 2×51528792681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51528792671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 954236875 + ... + 954236928.

It is an arithmetic number, because the mean of its divisors is an integer number (9542369020).

Almost surely, 2^51528792681 is an apocalyptic number.

It is an amenable number.

51528792681 is a deficient number, since it is larger than the sum of its proper divisors (24810159479).

51528792681 is a wasteful number, since it uses less digits than its factorization.

51528792681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908473812 (or 1908473806 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 54.

The spelling of 51528792681 in words is "fifty-one billion, five hundred twenty-eight million, seven hundred ninety-two thousand, six hundred eighty-one".