51551116630650 has 960 divisors, whose sum is σ = 186896737843200. Its totient is φ = 10241290598400.

The previous prime is 51551116630633. The next prime is 51551116630679. The reversal of 51551116630650 is 5603661115515.

51551116630650 is a `hidden beast` number, since 5 + 1 + 5 + 5 + 1 + 1 + 1 + 6 + 630 + 6 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51551116630596 and 51551116630605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 422665876 + ... + 422787824.

It is an arithmetic number, because the mean of its divisors is an integer number (194684101920).

Almost surely, 2^{51551116630650} is an apocalyptic number.

51551116630650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51551116630650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93448368921600).

51551116630650 is an abundant number, since it is smaller than the sum of its proper divisors (135345621212550).

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

51551116630650 is a wasteful number, since it uses less digits than its factorization.

51551116630650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122061 (or 122047 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 45.

The spelling of 51551116630650 in words is "fifty-one trillion, five hundred fifty-one billion, one hundred sixteen million, six hundred thirty thousand, six hundred fifty".