51702045513681 has 4 divisors (see below), whose sum is σ = 68936060684912. Its totient is φ = 34468030342452.

The previous prime is 51702045513661. The next prime is 51702045513733. The reversal of 51702045513681 is 18631554020715.

51702045513681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51702045513681 - 2²³ = 51702037125073 is a prime.

It is a super-2 number, since 2×51702045513681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51702045513681.

It is not an unprimeable number, because it can be changed into a prime (51702045513661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8617007585611 + ... + 8617007585616.

It is an arithmetic number, because the mean of its divisors is an integer number (17234015171228).

Almost surely, 2^{51702045513681} is an apocalyptic number.

It is an amenable number.

51702045513681 is a deficient number, since it is larger than the sum of its proper divisors (17234015171231).

51702045513681 is a wasteful number, since it uses less digits than its factorization.

51702045513681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17234015171230.

The product of its (nonzero) digits is 1008000, while the sum is 48.

The spelling of 51702045513681 in words is "fifty-one trillion, seven hundred two billion, forty-five million, five hundred thirteen thousand, six hundred eighty-one".