51069125605 has 4 divisors (see below), whose sum is σ = 61282950732. Its totient is φ = 40855300480.

The previous prime is 51069125579. The next prime is 51069125647. The reversal of 51069125605 is 50652196015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6991802689 + 44077322916 = 83617^2 + 209946^2 .

It is not a de Polignac number, because 51069125605 - 2⁷ = 51069125477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5106912556 + ... + 5106912565.

It is an arithmetic number, because the mean of its divisors is an integer number (15320737683).

Almost surely, 2^51069125605 is an apocalyptic number.

It is an amenable number.

51069125605 is a deficient number, since it is larger than the sum of its proper divisors (10213825127).

51069125605 is a wasteful number, since it uses less digits than its factorization.

51069125605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10213825126.

The product of its (nonzero) digits is 81000, while the sum is 40.

The spelling of 51069125605 in words is "fifty-one billion, sixty-nine million, one hundred twenty-five thousand, six hundred five".