51645401622161 has 16 divisors (see below), whose sum is σ = 52567836222720. Its totient is φ = 50727472456320.

The previous prime is 51645401621963. The next prime is 51645401622209. The reversal of 51645401622161 is 16122610454615.

51645401622161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51645401622161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51645401622461) 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 15 ways as a sum of consecutive naturals, for example, 149549951 + ... + 149894891.

It is an arithmetic number, because the mean of its divisors is an integer number (3285489763920).

Almost surely, 2^{51645401622161} is an apocalyptic number.

It is an amenable number.

51645401622161 is a deficient number, since it is larger than the sum of its proper divisors (922434600559).

51645401622161 is a wasteful number, since it uses less digits than its factorization.

51645401622161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351464.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 51645401622161 in words is "fifty-one trillion, six hundred forty-five billion, four hundred one million, six hundred twenty-two thousand, one hundred sixty-one".