51349705418881 has 4 divisors (see below), whose sum is σ = 54370276325892. Its totient is φ = 48329134511872.

The previous prime is 51349705418861. The next prime is 51349705418899. The reversal of 51349705418881 is 18881450794315.

51349705418881 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.

It can be written as a sum of positive squares in 2 ways, for example, as 28627475716225 + 22722229702656 = 5350465^2 + 4766784^2 .

It is a cyclic number.

It is not a de Polignac number, because 51349705418881 - 2³⁵ = 51315345680513 is a prime.

It is a super-2 number, since 2×51349705418881² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51349705418801) 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, 1510285453480 + ... + 1510285453513.

It is an arithmetic number, because the mean of its divisors is an integer number (13592569081473).

Almost surely, 2^{51349705418881} is an apocalyptic number.

It is an amenable number.

51349705418881 is a deficient number, since it is larger than the sum of its proper divisors (3020570907011).

51349705418881 is a wasteful number, since it uses less digits than its factorization.

51349705418881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020570907010.

The product of its (nonzero) digits is 38707200, while the sum is 64.

The spelling of 51349705418881 in words is "fifty-one trillion, three hundred forty-nine billion, seven hundred five million, four hundred eighteen thousand, eight hundred eighty-one".