51020504000 has 112 divisors (see below), whose sum is σ = 127112207040. Its totient is φ = 20285465600.

The previous prime is 51020503987. The next prime is 51020504077. The reversal of 51020504000 is 40502015.

It is a self number, because there is not a number n which added to its sum of digits gives 51020504000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1316906 + ... + 1355094.

It is an arithmetic number, because the mean of its divisors is an integer number (1134930420).

Almost surely, 2^51020504000 is an apocalyptic number.

51020504000 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 51020504000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63556103520).

51020504000 is an abundant number, since it is smaller than the sum of its proper divisors (76091703040).

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

51020504000 is a wasteful number, since it uses less digits than its factorization.

51020504000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38383 (or 38363 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The spelling of 51020504000 in words is "fifty-one billion, twenty million, five hundred four thousand".