51558659328 has 144 divisors (see below), whose sum is σ = 150653232576. Its totient is φ = 15523921920.

The previous prime is 51558659309. The next prime is 51558659363. The reversal of 51558659328 is 82395685515.

It is a super-2 number, since 2×51558659328² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1306900 + ... + 1345772.

It is an arithmetic number, because the mean of its divisors is an integer number (1046203004).

Almost surely, 2^51558659328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51558659328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75326616288).

51558659328 is an abundant number, since it is smaller than the sum of its proper divisors (99094573248).

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

51558659328 is a wasteful number, since it uses less digits than its factorization.

51558659328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39060 (or 39046 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 57.

The spelling of 51558659328 in words is "fifty-one billion, five hundred fifty-eight million, six hundred fifty-nine thousand, three hundred twenty-eight".