51081582709 has 16 divisors (see below), whose sum is σ = 51952473664. Its totient is φ = 50220518400.

The previous prime is 51081582697. The next prime is 51081582719. The reversal of 51081582709 is 90728518015.

It is a cyclic number.

It is not a de Polignac number, because 51081582709 - 2⁹ = 51081582197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51081582719) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5689594 + ... + 5698564.

It is an arithmetic number, because the mean of its divisors is an integer number (3247029604).

Almost surely, 2^51081582709 is an apocalyptic number.

It is an amenable number.

51081582709 is a deficient number, since it is larger than the sum of its proper divisors (870890955).

51081582709 is a wasteful number, since it uses less digits than its factorization.

51081582709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9508.

The product of its (nonzero) digits is 201600, while the sum is 46.

The spelling of 51081582709 in words is "fifty-one billion, eighty-one million, five hundred eighty-two thousand, seven hundred nine".