51485425216 has 63 divisors (see below), whose sum is σ = 103490826673. Its totient is φ = 25413248000.

The previous prime is 51485425183. The next prime is 51485425289. The reversal of 51485425216 is 61252458415.

The square root of 51485425216 is 226904.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 907214400 + 50578210816 = 30120^2 + 224896^2 .

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 205121091 + ... + 205121341.

Almost surely, 2^51485425216 is an apocalyptic number.

51485425216 is the 226904-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51485425216

51485425216 is an abundant number, since it is smaller than the sum of its proper divisors (52005401457).

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

51485425216 is an frugal number, since it uses more digits than its factorization.

51485425216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 366 counting only the distinct ones).

The product of its digits is 384000, while the sum is 43.

The spelling of 51485425216 in words is "fifty-one billion, four hundred eighty-five million, four hundred twenty-five thousand, two hundred sixteen".