51552799345728 has 84 divisors (see below), whose sum is σ = 147822409716540. Its totient is φ = 17177798393856.

The previous prime is 51552799345703. The next prime is 51552799345739. The reversal of 51552799345728 is 82754399725515.

51552799345728 is a `hidden beast` number, since 5 + 1 + 5 + 5 + 279 + 9 + 345 + 7 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34947109145664 + 16605690200064 = 5911608^2 + 4075008^2 .

It is a super-2 number, since 2×51552799345728² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

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 11 ways as a sum of consecutive naturals, for example, 15312133 + ... + 18372996.

Almost surely, 2^{51552799345728} is an apocalyptic number.

It is an amenable number.

51552799345728 is an abundant number, since it is smaller than the sum of its proper divisors (96269610370812).

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

51552799345728 is a wasteful number, since it uses less digits than its factorization.

51552799345728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33687804 (or 33687791 counting only the distinct ones).

The product of its digits is 952560000, while the sum is 72.

The spelling of 51552799345728 in words is "fifty-one trillion, five hundred fifty-two billion, seven hundred ninety-nine million, three hundred forty-five thousand, seven hundred twenty-eight".