63280621999 has 4 divisors (see below), whose sum is σ = 72320710864. Its totient is φ = 54240533136.

The previous prime is 63280621981. The next prime is 63280622123. The reversal of 63280621999 is 99912608236.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63280621999 - 2¹³ = 63280613807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63280621979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4520044422 + ... + 4520044435.

It is an arithmetic number, because the mean of its divisors is an integer number (18080177716).

Almost surely, 2^63280621999 is an apocalyptic number.

63280621999 is a deficient number, since it is larger than the sum of its proper divisors (9040088865).

63280621999 is an equidigital number, since it uses as much as digits as its factorization.

63280621999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9040088864.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The spelling of 63280621999 in words is "sixty-three billion, two hundred eighty million, six hundred twenty-one thousand, nine hundred ninety-nine".