51662878555068 has 96 divisors (see below), whose sum is σ = 146119034853120. Its totient is φ = 15655224611520.

The previous prime is 51662878555051. The next prime is 51662878555117. The reversal of 51662878555068 is 86055587826615.

51662878555068 is a `hidden beast` number, since 5 + 1 + 6 + 6 + 2 + 8 + 7 + 8 + 5 + 550 + 68 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 51662878554987 and 51662878555005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118014846 + ... + 118451802.

It is an arithmetic number, because the mean of its divisors is an integer number (1522073279720).

Almost surely, 2^{51662878555068} is an apocalyptic number.

It is an amenable number.

51662878555068 is an abundant number, since it is smaller than the sum of its proper divisors (94456156298052).

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

51662878555068 is a wasteful number, since it uses less digits than its factorization.

51662878555068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536504 (or 536496 counting only the distinct ones).

The product of its (nonzero) digits is 967680000, while the sum is 72.

The spelling of 51662878555068 in words is "fifty-one trillion, six hundred sixty-two billion, eight hundred seventy-eight million, five hundred fifty-five thousand, sixty-eight".