51438361025681 has 8 divisors (see below), whose sum is σ = 58836223765440. Its totient is φ = 44052879648528.

The previous prime is 51438361025677. The next prime is 51438361025683. The reversal of 51438361025681 is 18652016383415.

It is a happy number.

51438361025681 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 a cyclic number.

It is not a de Polignac number, because 51438361025681 - 2² = 51438361025677 is a prime.

It is a super-2 number, since 2×51438361025681² (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 (51438361025683) 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, 3095331746 + ... + 3095348363.

It is an arithmetic number, because the mean of its divisors is an integer number (7354527970680).

Almost surely, 2^{51438361025681} is an apocalyptic number.

It is an amenable number.

51438361025681 is a deficient number, since it is larger than the sum of its proper divisors (7397862739759).

51438361025681 is a wasteful number, since it uses less digits than its factorization.

51438361025681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6190681303.

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 51438361025681 in words is "fifty-one trillion, four hundred thirty-eight billion, three hundred sixty-one million, twenty-five thousand, six hundred eighty-one".