51518328836 has 24 divisors (see below), whose sum is σ = 98422272984. Its totient is φ = 23451966720.

The previous prime is 51518328817. The next prime is 51518328857. The reversal of 51518328836 is 63882381515.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1037226436 + 50481102400 = 32206^2 + 224680^2 .

It is a super-2 number, since 2×51518328836² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 6782075 + ... + 6789666.

It is an arithmetic number, because the mean of its divisors is an integer number (4100928041).

Almost surely, 2^51518328836 is an apocalyptic number.

It is an amenable number.

51518328836 is a deficient number, since it is larger than the sum of its proper divisors (46903944148).

51518328836 is a wasteful number, since it uses less digits than its factorization.

51518328836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13571831 (or 13571829 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 50.

The spelling of 51518328836 in words is "fifty-one billion, five hundred eighteen million, three hundred twenty-eight thousand, eight hundred thirty-six".