51286822912 has 208 divisors, whose sum is σ = 119265546960. Its totient is φ = 21837643776.

The previous prime is 51286822897. The next prime is 51286822943. The reversal of 51286822912 is 21922868215.

It can be written as a sum of positive squares in 8 ways, for example, as 131239936 + 51155582976 = 11456^2 + 226176^2 .

It is a tau number, because it is divible by the number of its divisors (208).

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, 47975914 + ... + 47976982.

Almost surely, 2^51286822912 is an apocalyptic number.

51286822912 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51286822912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59632773480).

51286822912 is an abundant number, since it is smaller than the sum of its proper divisors (67978724048).

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

51286822912 is a wasteful number, since it uses less digits than its factorization.

51286822912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 1154 counting only the distinct ones).

The product of its digits is 276480, while the sum is 46.

The spelling of 51286822912 in words is "fifty-one billion, two hundred eighty-six million, eight hundred twenty-two thousand, nine hundred twelve".