51028457161 has 4 divisors (see below), whose sum is σ = 55667407824. Its totient is φ = 46389506500.

The previous prime is 51028457089. The next prime is 51028457191. The reversal of 51028457161 is 16175482015.

51028457161 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 51028457161 - 2¹⁹ = 51027932873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51028457191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2319475315 + ... + 2319475336.

It is an arithmetic number, because the mean of its divisors is an integer number (13916851956).

Almost surely, 2^51028457161 is an apocalyptic number.

It is an amenable number.

51028457161 is a deficient number, since it is larger than the sum of its proper divisors (4638950663).

51028457161 is a wasteful number, since it uses less digits than its factorization.

51028457161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4638950662.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 51028457161 in words is "fifty-one billion, twenty-eight million, four hundred fifty-seven thousand, one hundred sixty-one".