51989636160 has 1344 divisors, whose sum is σ = 243906324480. Its totient is φ = 10212065280.

The previous prime is 51989636131. The next prime is 51989636177. The reversal of 51989636160 is 6163698915.

51989636160 is a `hidden beast` number, since 5 + 19 + 8 + 9 + 6 + 3 + 616 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 51989636097 and 51989636106.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 113762652 + ... + 113763108.

It is an arithmetic number, because the mean of its divisors is an integer number (181477920).

Almost surely, 2^51989636160 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 51989636160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121953162240).

51989636160 is an abundant number, since it is smaller than the sum of its proper divisors (191916688320).

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

51989636160 is a wasteful number, since it uses less digits than its factorization.

51989636160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 51989636160 in words is "fifty-one billion, nine hundred eighty-nine million, six hundred thirty-six thousand, one hundred sixty".