51010651056161 has 4 divisors (see below), whose sum is σ = 53695422164400. Its totient is φ = 48325879947924.

The previous prime is 51010651056077. The next prime is 51010651056179. The reversal of 51010651056161 is 16165015601015.

It is a happy number.

51010651056161 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 a cyclic number.

It is not a de Polignac number, because 51010651056161 - 2¹⁸ = 51010650794017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51010651056061) 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, 1342385554091 + ... + 1342385554128.

It is an arithmetic number, because the mean of its divisors is an integer number (13423855541100).

Almost surely, 2^{51010651056161} is an apocalyptic number.

It is an amenable number.

51010651056161 is a deficient number, since it is larger than the sum of its proper divisors (2684771108239).

51010651056161 is a wasteful number, since it uses less digits than its factorization.

51010651056161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684771108238.

The product of its (nonzero) digits is 27000, while the sum is 38.

Adding to 51010651056161 its reverse (16165015601015), we get a palindrome (67175666657176).

The spelling of 51010651056161 in words is "fifty-one trillion, ten billion, six hundred fifty-one million, fifty-six thousand, one hundred sixty-one".