51446039647 has 2 divisors, whose sum is σ = 51446039648. Its totient is φ = 51446039646.

The previous prime is 51446039581. The next prime is 51446039731. The reversal of 51446039647 is 74693064415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51446039647 - 2²⁷ = 51311821919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51446039647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51446039147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25723019823 + 25723019824.

It is an arithmetic number, because the mean of its divisors is an integer number (25723019824).

Almost surely, 2^51446039647 is an apocalyptic number.

51446039647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51446039647 is an equidigital number, since it uses as much as digits as its factorization.

51446039647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 51446039647 in words is "fifty-one billion, four hundred forty-six million, thirty-nine thousand, six hundred forty-seven".