51044085689 has 4 divisors (see below), whose sum is σ = 51048856656. Its totient is φ = 51039314724.

The previous prime is 51044085667. The next prime is 51044085691. The reversal of 51044085689 is 98658044015.

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 51044085689 - 2²⁰ = 51043037113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51044085649) 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, 2369399 + ... + 2390844.

It is an arithmetic number, because the mean of its divisors is an integer number (12762214164).

Almost surely, 2^51044085689 is an apocalyptic number.

It is an amenable number.

51044085689 is a deficient number, since it is larger than the sum of its proper divisors (4770967).

51044085689 is a wasteful number, since it uses less digits than its factorization.

51044085689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770966.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The spelling of 51044085689 in words is "fifty-one billion, forty-four million, eighty-five thousand, six hundred eighty-nine".