51998168376 has 768 divisors, whose sum is σ = 196245504000. Its totient is φ = 12490744320.

The previous prime is 51998168363. The next prime is 51998168429. The reversal of 51998168376 is 67386189915.

51998168376 is a `hidden beast` number, since 5 + 19 + 98 + 168 + 376 = 666.

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

It is a congruent number.

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, 133671190 + ... + 133671578.

It is an arithmetic number, because the mean of its divisors is an integer number (255528000).

Almost surely, 2^51998168376 is an apocalyptic number.

51998168376 is a gapful number since it is divisible by the number (56) 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 51998168376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98122752000).

51998168376 is an abundant number, since it is smaller than the sum of its proper divisors (144247335624).

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

51998168376 is a wasteful number, since it uses less digits than its factorization.

51998168376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 478 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 63.

The spelling of 51998168376 in words is "fifty-one billion, nine hundred ninety-eight million, one hundred sixty-eight thousand, three hundred seventy-six".