51663233338158 has 128 divisors (see below), whose sum is σ = 121034603289600. Its totient is φ = 14553324103680.

The previous prime is 51663233338133. The next prime is 51663233338181. The reversal of 51663233338158 is 85183333236615.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51663233338098 and 51663233338107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 200583943 + ... + 200841341.

It is an arithmetic number, because the mean of its divisors is an integer number (945582838200).

Almost surely, 2^{51663233338158} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51663233338158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60517301644800).

51663233338158 is an abundant number, since it is smaller than the sum of its proper divisors (69371369951442).

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

51663233338158 is a wasteful number, since it uses less digits than its factorization.

51663233338158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261562.

The product of its digits is 27993600, while the sum is 57.

The spelling of 51663233338158 in words is "fifty-one trillion, six hundred sixty-three billion, two hundred thirty-three million, three hundred thirty-eight thousand, one hundred fifty-eight".