51724768788 has 648 divisors, whose sum is σ = 179432687616. Its totient is φ = 12286391040.

The previous prime is 51724768741. The next prime is 51724768789. The reversal of 51724768788 is 88786742715.

51724768788 is a `hidden beast` number, since 5 + 1 + 7 + 2 + 476 + 87 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51724768789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 407281581 + ... + 407281707.

Almost surely, 2^51724768788 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 51724768788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89716343808).

51724768788 is an abundant number, since it is smaller than the sum of its proper divisors (127707918828).

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

51724768788 is a wasteful number, since it uses less digits than its factorization.

51724768788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 206 counting only the distinct ones).

The product of its digits is 42147840, while the sum is 63.

The spelling of 51724768788 in words is "fifty-one billion, seven hundred twenty-four million, seven hundred sixty-eight thousand, seven hundred eighty-eight".