51253044480 has 648 divisors, whose sum is σ = 197710347744. Its totient is φ = 12247572480.

The previous prime is 51253044457. The next prime is 51253044509. The reversal of 51253044480 is 8444035215.

It is a happy number.

51253044480 is a `hidden beast` number, since 5 + 1 + 2 + 530 + 4 + 44 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 115695139 + ... + 115695581.

Almost surely, 2^51253044480 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 51253044480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98855173872).

51253044480 is an abundant number, since it is smaller than the sum of its proper divisors (146457303264).

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

51253044480 is a wasteful number, since it uses less digits than its factorization.

51253044480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 51253044480 its reverse (8444035215), we get a palindrome (59697079695).

The spelling of 51253044480 in words is "fifty-one billion, two hundred fifty-three million, forty-four thousand, four hundred eighty".