51667108447 has 2 divisors, whose sum is σ = 51667108448. Its totient is φ = 51667108446.

The previous prime is 51667108349. The next prime is 51667108453. The reversal of 51667108447 is 74480176615.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51667108447 - 2³¹ = 49519624799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51667108447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51667100447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25833554223 + 25833554224.

It is an arithmetic number, because the mean of its divisors is an integer number (25833554224).

Almost surely, 2^51667108447 is an apocalyptic number.

51667108447 is a deficient number, since it is larger than the sum of its proper divisors (1).

51667108447 is an equidigital number, since it uses as much as digits as its factorization.

51667108447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 51667108447 in words is "fifty-one billion, six hundred sixty-seven million, one hundred eight thousand, four hundred forty-seven".