51702121386681 has 8 divisors (see below), whose sum is σ = 70236844148160. Its totient is φ = 33817739774832.

The previous prime is 51702121386677. The next prime is 51702121386781. The reversal of 51702121386681 is 18668312120715.

51702121386681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51702121386681 - 2² = 51702121386677 is a prime.

It is a super-2 number, since 2×51702121386681² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51702121386661) 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 7 ways as a sum of consecutive naturals, for example, 162585287221 + ... + 162585287538.

It is an arithmetic number, because the mean of its divisors is an integer number (8779605518520).

Almost surely, 2^{51702121386681} is an apocalyptic number.

It is an amenable number.

51702121386681 is a deficient number, since it is larger than the sum of its proper divisors (18534722761479).

51702121386681 is a wasteful number, since it uses less digits than its factorization.

51702121386681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325170574815.

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 51702121386681 in words is "fifty-one trillion, seven hundred two billion, one hundred twenty-one million, three hundred eighty-six thousand, six hundred eighty-one".