51752463840 has 384 divisors, whose sum is σ = 225830384640. Its totient is φ = 10753689600.

The previous prime is 51752463821. The next prime is 51752463857. The reversal of 51752463840 is 4836425715.

51752463840 is a `hidden beast` number, since 5 + 1 + 7 + 5 + 2 + 4 + 638 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 63 ways as a sum of consecutive naturals, for example, 254850 + ... + 410430.

It is an arithmetic number, because the mean of its divisors is an integer number (588099960).

Almost surely, 2^51752463840 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 51752463840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112915192320).

51752463840 is an abundant number, since it is smaller than the sum of its proper divisors (174077920800).

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

51752463840 is a wasteful number, since it uses less digits than its factorization.

51752463840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155623 (or 155609 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 51752463840 in words is "fifty-one billion, seven hundred fifty-two million, four hundred sixty-three thousand, eight hundred forty".