51721065516710 has 64 divisors (see below), whose sum is σ = 98787379825152. Its totient is φ = 19429401040896.

The previous prime is 51721065516683. The next prime is 51721065516739. The reversal of 51721065516710 is 1761556012715.

It is a Curzon number.

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, 177137099 + ... + 177428841.

It is an arithmetic number, because the mean of its divisors is an integer number (1543552809768).

Almost surely, 2^{51721065516710} is an apocalyptic number.

51721065516710 is a deficient number, since it is larger than the sum of its proper divisors (47066314308442).

51721065516710 is a wasteful number, since it uses less digits than its factorization.

51721065516710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294017.

The product of its (nonzero) digits is 441000, while the sum is 47.

The spelling of 51721065516710 in words is "fifty-one trillion, seven hundred twenty-one billion, sixty-five million, five hundred sixteen thousand, seven hundred ten".