63519993673 has 2 divisors, whose sum is σ = 63519993674. Its totient is φ = 63519993672.

The previous prime is 63519993671. The next prime is 63519993727. The reversal of 63519993673 is 37639991536.

63519993673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49627363984 + 13892629689 = 222772^2 + 117867^2 .

It is a cyclic number.

It is not a de Polignac number, because 63519993673 - 2¹ = 63519993671 is a prime.

Together with 63519993671, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (63519993671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31759996836 + 31759996837.

It is an arithmetic number, because the mean of its divisors is an integer number (31759996837).

Almost surely, 2^63519993673 is an apocalyptic number.

It is an amenable number.

63519993673 is a deficient number, since it is larger than the sum of its proper divisors (1).

63519993673 is an equidigital number, since it uses as much as digits as its factorization.

63519993673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24800580, while the sum is 61.

The spelling of 63519993673 in words is "sixty-three billion, five hundred nineteen million, nine hundred ninety-three thousand, six hundred seventy-three".