51573955800 has 192 divisors, whose sum is σ = 161064691200. Its totient is φ = 13651545600.

The previous prime is 51573955787. The next prime is 51573955933. The reversal of 51573955800 is 855937515.

It is a Cunningham number, because it is equal to 227099²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 51573955800.

It is a congruent number.

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, 68129022 + ... + 68129778.

It is an arithmetic number, because the mean of its divisors is an integer number (838878600).

Almost surely, 2^51573955800 is an apocalyptic number.

51573955800 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 51573955800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80532345600).

51573955800 is an abundant number, since it is smaller than the sum of its proper divisors (109490735400).

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

51573955800 is a wasteful number, since it uses less digits than its factorization.

51573955800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 48.

The spelling of 51573955800 in words is "fifty-one billion, five hundred seventy-three million, nine hundred fifty-five thousand, eight hundred".