51219404800 has 144 divisors (see below), whose sum is σ = 128009306880. Its totient is φ = 20323860480.

The previous prime is 51219404791. The next prime is 51219404809. The reversal of 51219404800 is 840491215.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51219404791) and next prime (51219404809).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51219404809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6498462 + ... + 6506338.

It is an arithmetic number, because the mean of its divisors is an integer number (888953520).

Almost surely, 2^51219404800 is an apocalyptic number.

51219404800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51219404800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64004653440).

51219404800 is an abundant number, since it is smaller than the sum of its proper divisors (76789902080).

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

51219404800 is a wasteful number, since it uses less digits than its factorization.

51219404800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8036 (or 8011 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 51219404800 in words is "fifty-one billion, two hundred nineteen million, four hundred four thousand, eight hundred".