51886789920 has 1152 divisors, whose sum is σ = 225820224000. Its totient is φ = 11119804416.

The previous prime is 51886789897. The next prime is 51886789949. The reversal of 51886789920 is 2998768815.

It is a happy number.

51886789920 is a `hidden beast` number, since 518 + 8 + 6 + 7 + 8 + 99 + 20 = 666.

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

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 534915312 + ... + 534915408.

It is an arithmetic number, because the mean of its divisors is an integer number (196024500).

Almost surely, 2^51886789920 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 51886789920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112910112000).

51886789920 is an abundant number, since it is smaller than the sum of its proper divisors (173933434080).

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

51886789920 is a wasteful number, since it uses less digits than its factorization.

51886789920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 51886789920 in words is "fifty-one billion, eight hundred eighty-six million, seven hundred eighty-nine thousand, nine hundred twenty".