51560587264 has 84 divisors (see below), whose sum is σ = 104314722282. Its totient is φ = 25483673600.

The previous prime is 51560587217. The next prime is 51560587313. The reversal of 51560587264 is 46278506515.

It can be written as a sum of positive squares in 3 ways, for example, as 50895360000 + 665227264 = 225600^2 + 25792^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83566284 + ... + 83566900.

Almost surely, 2^51560587264 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 51560587264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52157361141).

51560587264 is an abundant number, since it is smaller than the sum of its proper divisors (52754135018).

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

51560587264 is an frugal number, since it uses more digits than its factorization.

51560587264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 51560587264 in words is "fifty-one billion, five hundred sixty million, five hundred eighty-seven thousand, two hundred sixty-four".