51166213543505 has 16 divisors (see below), whose sum is σ = 65011586722560. Its totient is φ = 38524913317632.

The previous prime is 51166213543477. The next prime is 51166213543513. The reversal of 51166213543505 is 50534531266115.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51166213543505 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51166213543505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12815576 + ... + 16327014.

It is an arithmetic number, because the mean of its divisors is an integer number (4063224170160).

Almost surely, 2^{51166213543505} is an apocalyptic number.

It is an amenable number.

51166213543505 is a deficient number, since it is larger than the sum of its proper divisors (13845373179055).

51166213543505 is a wasteful number, since it uses less digits than its factorization.

51166213543505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682888.

The product of its (nonzero) digits is 1620000, while the sum is 47.

The spelling of 51166213543505 in words is "fifty-one trillion, one hundred sixty-six billion, two hundred thirteen million, five hundred forty-three thousand, five hundred five".