51555395304 has 192 divisors, whose sum is σ = 171486806400. Its totient is φ = 13656563712.

The previous prime is 51555395293. The next prime is 51555395323. The reversal of 51555395304 is 40359355515.

51555395304 is a `hidden beast` number, since 5 + 1 + 5 + 553 + 95 + 3 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51555395304.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 529152 + ... + 618960.

It is an arithmetic number, because the mean of its divisors is an integer number (893160450).

Almost surely, 2^51555395304 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 51555395304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85743403200).

51555395304 is an abundant number, since it is smaller than the sum of its proper divisors (119931411096).

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

51555395304 is a wasteful number, since it uses less digits than its factorization.

51555395304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89912 (or 89905 counting only the distinct ones).

The product of its (nonzero) digits is 1012500, while the sum is 45.

The spelling of 51555395304 in words is "fifty-one billion, five hundred fifty-five million, three hundred ninety-five thousand, three hundred four".