63443634436 has 48 divisors (see below), whose sum is σ = 138572501760. Its totient is φ = 24745069440.

The previous prime is 63443634409. The next prime is 63443634481.

It is a happy number.

63443634436 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1201591 + ... + 1253278.

It is an arithmetic number, because the mean of its divisors is an integer number (2886927120).

Almost surely, 2^63443634436 is an apocalyptic number.

It is an amenable number.

63443634436 is an abundant number, since it is smaller than the sum of its proper divisors (75128867324).

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

63443634436 is a wasteful number, since it uses less digits than its factorization.

63443634436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454964 (or 2454962 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 46.

The spelling of 63443634436 in words is "sixty-three billion, four hundred forty-three million, six hundred thirty-four thousand, four hundred thirty-six".