51444006641 has 2 divisors, whose sum is σ = 51444006642. Its totient is φ = 51444006640.

The previous prime is 51444006623. The next prime is 51444006673. The reversal of 51444006641 is 14660044415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48486278416 + 2957728225 = 220196^2 + 54385^2 .

It is a cyclic number.

It is not a de Polignac number, because 51444006641 - 2⁶ = 51444006577 is a prime.

It is not a weakly prime, because it can be changed into another prime (51444006041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25722003320 + 25722003321.

It is an arithmetic number, because the mean of its divisors is an integer number (25722003321).

Almost surely, 2^51444006641 is an apocalyptic number.

It is an amenable number.

51444006641 is a deficient number, since it is larger than the sum of its proper divisors (1).

51444006641 is an equidigital number, since it uses as much as digits as its factorization.

51444006641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 51444006641 in words is "fifty-one billion, four hundred forty-four million, six thousand, six hundred forty-one".