51756586721 has 8 divisors (see below), whose sum is σ = 59152006464. Its totient is φ = 44361572400.

The previous prime is 51756586681. The next prime is 51756586757. The reversal of 51756586721 is 12768565715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51756586721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51756526721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256406 + ... + 411408.

It is an arithmetic number, because the mean of its divisors is an integer number (7394000808).

Almost surely, 2^51756586721 is an apocalyptic number.

It is an amenable number.

51756586721 is a deficient number, since it is larger than the sum of its proper divisors (7395419743).

51756586721 is a wasteful number, since it uses less digits than its factorization.

51756586721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202711.

The product of its digits is 3528000, while the sum is 53.

The spelling of 51756586721 in words is "fifty-one billion, seven hundred fifty-six million, five hundred eighty-six thousand, seven hundred twenty-one".