51012766205 has 8 divisors (see below), whose sum is σ = 61276724952. Its totient is φ = 40769275968.

The previous prime is 51012766171. The next prime is 51012766249. The reversal of 51012766205 is 50266721015.

It can be written as a sum of positive squares in 4 ways, for example, as 11295863524 + 39716902681 = 106282^2 + 199291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51012766205 - 2¹² = 51012762109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5111642 + ... + 5121611.

It is an arithmetic number, because the mean of its divisors is an integer number (7659590619).

Almost surely, 2^51012766205 is an apocalyptic number.

It is an amenable number.

51012766205 is a deficient number, since it is larger than the sum of its proper divisors (10263958747).

51012766205 is a wasteful number, since it uses less digits than its factorization.

51012766205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10234255.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 51012766205 in words is "fifty-one billion, twelve million, seven hundred sixty-six thousand, two hundred five".