51638658192 has 240 divisors, whose sum is σ = 163092686400. Its totient is φ = 15514053120.

The previous prime is 51638658191. The next prime is 51638658209. The reversal of 51638658192 is 29185683615.

51638658192 is a `hidden beast` number, since 51 + 6 + 3 + 8 + 6 + 581 + 9 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (51638658191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 126255684 + ... + 126256092.

It is an arithmetic number, because the mean of its divisors is an integer number (679552860).

Almost surely, 2^51638658192 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 51638658192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81546343200).

51638658192 is an abundant number, since it is smaller than the sum of its proper divisors (111454028208).

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

51638658192 is a wasteful number, since it uses less digits than its factorization.

51638658192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763 (or 588 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 51638658192 in words is "fifty-one billion, six hundred thirty-eight million, six hundred fifty-eight thousand, one hundred ninety-two".