51550104320 has 216 divisors, whose sum is σ = 146170470768. Its totient is φ = 17302855680.

The previous prime is 51550104311. The next prime is 51550104323. The reversal of 51550104320 is 2340105515.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 51550104320.

It is not an unprimeable number, because it can be changed into a prime (51550104323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2000639 + ... + 2026241.

Almost surely, 2^51550104320 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 51550104320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73085235384).

51550104320 is an abundant number, since it is smaller than the sum of its proper divisors (94620366448).

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

51550104320 is a wasteful number, since it uses less digits than its factorization.

51550104320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25659 (or 25634 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 51550104320 its reverse (2340105515), we get a palindrome (53890209835).

The spelling of 51550104320 in words is "fifty-one billion, five hundred fifty million, one hundred four thousand, three hundred twenty".