51204130560 has 1440 divisors, whose sum is σ = 224372332800. Its totient is φ = 10988421120.

The previous prime is 51204130531. The next prime is 51204130573. The reversal of 51204130560 is 6503140215.

51204130560 is a `hidden beast` number, since 51 + 20 + 4 + 1 + 30 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 368374971 + ... + 368375109.

It is an arithmetic number, because the mean of its divisors is an integer number (155814120).

Almost surely, 2^51204130560 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 51204130560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112186166400).

51204130560 is an abundant number, since it is smaller than the sum of its proper divisors (173168202240).

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

51204130560 is a wasteful number, since it uses less digits than its factorization.

51204130560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 51204130560 its reverse (6503140215), we get a palindrome (57707270775).

The spelling of 51204130560 in words is "fifty-one billion, two hundred four million, one hundred thirty thousand, five hundred sixty".