51206520000 has 560 divisors, whose sum is σ = 183329315840. Its totient is φ = 12566016000.

The previous prime is 51206519989. The next prime is 51206520017. The reversal of 51206520000 is 2560215.

51206520000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 84359697 + ... + 84360303.

Almost surely, 2^51206520000 is an apocalyptic number.

51206520000 is a gapful number since it is divisible by the number (50) 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 51206520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91664657920).

51206520000 is an abundant number, since it is smaller than the sum of its proper divisors (132122795840).

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

51206520000 is a wasteful number, since it uses less digits than its factorization.

51206520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The spelling of 51206520000 in words is "fifty-one billion, two hundred six million, five hundred twenty thousand".