51408884736 has 440 divisors, whose sum is σ = 168790707200. Its totient is φ = 15455784960.

The previous prime is 51408884701. The next prime is 51408884777. The reversal of 51408884736 is 63748880415.

51408884736 is a `hidden beast` number, since 51 + 40 + 8 + 88 + 473 + 6 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 404794305 + ... + 404794431.

Almost surely, 2^51408884736 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 51408884736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84395353600).

51408884736 is an abundant number, since it is smaller than the sum of its proper divisors (117381822464).

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

51408884736 is an equidigital number, since it uses as much as digits as its factorization.

51408884736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 51408884736 in words is "fifty-one billion, four hundred eight million, eight hundred eighty-four thousand, seven hundred thirty-six".