63172043447 has 2 divisors, whose sum is σ = 63172043448. Its totient is φ = 63172043446.

The previous prime is 63172043437. The next prime is 63172043479. The reversal of 63172043447 is 74434027136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63172043447 - 2¹⁴ = 63172027063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63172043437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31586021723 + 31586021724.

It is an arithmetic number, because the mean of its divisors is an integer number (31586021724).

Almost surely, 2^63172043447 is an apocalyptic number.

63172043447 is a deficient number, since it is larger than the sum of its proper divisors (1).

63172043447 is an equidigital number, since it uses as much as digits as its factorization.

63172043447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 41.

The spelling of 63172043447 in words is "sixty-three billion, one hundred seventy-two million, forty-three thousand, four hundred forty-seven".