51804493488 has 240 divisors, whose sum is σ = 164335481856. Its totient is φ = 15668017920.

The previous prime is 51804493427. The next prime is 51804493511. The reversal of 51804493488 is 88439440815.

It is a happy number.

51804493488 is a `hidden beast` number, since 518 + 0 + 4 + 49 + 3 + 4 + 88 = 666.

51804493488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51804493488² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 33058881 + ... + 33060447.

Almost surely, 2^51804493488 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 51804493488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82167740928).

51804493488 is an abundant number, since it is smaller than the sum of its proper divisors (112530988368).

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

51804493488 is a wasteful number, since it uses less digits than its factorization.

51804493488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374 (or 2356 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The spelling of 51804493488 in words is "fifty-one billion, eight hundred four million, four hundred ninety-three thousand, four hundred eighty-eight".