51210617584 has 80 divisors (see below), whose sum is σ = 115700451840. Its totient is φ = 21504994560.

The previous prime is 51210617561. The next prime is 51210617587. The reversal of 51210617584 is 48571601215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51210617587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1276422 + ... + 1315930.

It is an arithmetic number, because the mean of its divisors is an integer number (1446255648).

Almost surely, 2^51210617584 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 51210617584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57850225920).

51210617584 is an abundant number, since it is smaller than the sum of its proper divisors (64489834256).

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

51210617584 is a wasteful number, since it uses less digits than its factorization.

51210617584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39758 (or 39752 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 51210617584 in words is "fifty-one billion, two hundred ten million, six hundred seventeen thousand, five hundred eighty-four".