51128758836 has 72 divisors (see below), whose sum is σ = 129624540864. Its totient is φ = 16992581760.

The previous prime is 51128758787. The next prime is 51128758873. The reversal of 51128758836 is 63885782115.

51128758836 is a `hidden beast` number, since 5 + 1 + 1 + 28 + 7 + 588 + 36 = 666.

It is a super-2 number, since 2×51128758836² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 28674801 + ... + 28676583.

Almost surely, 2^51128758836 is an apocalyptic number.

It is an amenable number.

51128758836 is an abundant number, since it is smaller than the sum of its proper divisors (78495782028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51128758836 is a wasteful number, since it uses less digits than its factorization.

51128758836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701 (or 3696 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The spelling of 51128758836 in words is "fifty-one billion, one hundred twenty-eight million, seven hundred fifty-eight thousand, eight hundred thirty-six".