51550190208 has 512 divisors, whose sum is σ = 173322316800. Its totient is φ = 14944849920.

The previous prime is 51550190189. The next prime is 51550190213. The reversal of 51550190208 is 80209105515.

It is a happy number.

51550190208 is a `hidden beast` number, since 515 + 50 + 1 + 90 + 2 + 0 + 8 = 666.

It is a super-2 number, since 2×51550190208² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94241391 + ... + 94241937.

It is an arithmetic number, because the mean of its divisors is an integer number (338520150).

Almost surely, 2^51550190208 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 51550190208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86661158400).

51550190208 is an abundant number, since it is smaller than the sum of its proper divisors (121772126592).

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

51550190208 is a wasteful number, since it uses less digits than its factorization.

51550190208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The spelling of 51550190208 in words is "fifty-one billion, five hundred fifty million, one hundred ninety thousand, two hundred eight".