51166515616047 has 24 divisors (see below), whose sum is σ = 79608936786288. Its totient is φ = 31480527744000.

The previous prime is 51166515616037. The next prime is 51166515616049. The reversal of 51166515616047 is 74061651566115.

51166515616047 is a `hidden beast` number, since 5 + 1 + 1 + 6 + 6 + 5 + 15 + 616 + 0 + 4 + 7 = 666.

It is not a de Polignac number, because 51166515616047 - 2²² = 51166511421743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51166515615984 and 51166515616002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51166515616049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44983029 + ... + 46106462.

It is an arithmetic number, because the mean of its divisors is an integer number (3317039032762).

Almost surely, 2^{51166515616047} is an apocalyptic number.

51166515616047 is a deficient number, since it is larger than the sum of its proper divisors (28442421170241).

51166515616047 is a wasteful number, since it uses less digits than its factorization.

51166515616047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91094311 (or 91094308 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 54.

The spelling of 51166515616047 in words is "fifty-one trillion, one hundred sixty-six billion, five hundred fifteen million, six hundred sixteen thousand, forty-seven".