63444644436 has 48 divisors (see below), whose sum is σ = 157448600064. Its totient is φ = 19814931456.

The previous prime is 63444644429. The next prime is 63444644489.

63444644436 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×63444644436² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651825 + ... + 742808.

It is an arithmetic number, because the mean of its divisors is an integer number (3280179168).

Almost surely, 2^63444644436 is an apocalyptic number.

It is an amenable number.

63444644436 is an abundant number, since it is smaller than the sum of its proper divisors (94003955628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63444644436 is a wasteful number, since it uses less digits than its factorization.

63444644436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394880 (or 1394878 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 48.

The spelling of 63444644436 in words is "sixty-three billion, four hundred forty-four million, six hundred forty-four thousand, four hundred thirty-six".