63954281719 has 2 divisors, whose sum is σ = 63954281720. Its totient is φ = 63954281718.

The previous prime is 63954281681. The next prime is 63954281731. The reversal of 63954281719 is 91718245936.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63954281719 - 2²³ = 63945893111 is a prime.

It is a super-2 number, since 2×63954281719² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63954281719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63954281779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31977140859 + 31977140860.

It is an arithmetic number, because the mean of its divisors is an integer number (31977140860).

Almost surely, 2^63954281719 is an apocalyptic number.

63954281719 is a deficient number, since it is larger than the sum of its proper divisors (1).

63954281719 is an equidigital number, since it uses as much as digits as its factorization.

63954281719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The spelling of 63954281719 in words is "sixty-three billion, nine hundred fifty-four million, two hundred eighty-one thousand, seven hundred nineteen".