63663447373 has 4 divisors (see below), whose sum is σ = 67408356060. Its totient is φ = 59918538688.

The previous prime is 63663447359. The next prime is 63663447403. The reversal of 63663447373 is 37374436636.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22789525444 + 40873921929 = 150962^2 + 202173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63663447373 is a prime.

It is a super-2 number, since 2×63663447373² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63663447373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63663447313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872454318 + ... + 1872454351.

It is an arithmetic number, because the mean of its divisors is an integer number (16852089015).

Almost surely, 2^63663447373 is an apocalyptic number.

It is an amenable number.

63663447373 is a deficient number, since it is larger than the sum of its proper divisors (3744908687).

63663447373 is a wasteful number, since it uses less digits than its factorization.

63663447373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744908686.

The product of its digits is 13716864, while the sum is 52.

The spelling of 63663447373 in words is "sixty-three billion, six hundred sixty-three million, four hundred forty-seven thousand, three hundred seventy-three".