51776306721444 has 24 divisors (see below), whose sum is σ = 120811805801568. Its totient is φ = 17258708414080.

The previous prime is 51776306721421. The next prime is 51776306721449. The reversal of 51776306721444 is 44412760367715.

It is not an unprimeable number, because it can be changed into a prime (51776306721449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3925422 + ... + 10906949.

It is an arithmetic number, because the mean of its divisors is an integer number (5033825241732).

Almost surely, 2^{51776306721444} is an apocalyptic number.

It is an amenable number.

51776306721444 is an abundant number, since it is smaller than the sum of its proper divisors (69035499080124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51776306721444 is a wasteful number, since it uses less digits than its factorization.

51776306721444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15123275 (or 15123273 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 57.

The spelling of 51776306721444 in words is "fifty-one trillion, seven hundred seventy-six billion, three hundred six million, seven hundred twenty-one thousand, four hundred forty-four".