63604440636 has 24 divisors (see below), whose sum is σ = 161902212864. Its totient is φ = 19274072880.

The previous prime is 63604440631. The next prime is 63604440667.

63604440636 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63604440631) 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 7 ways as a sum of consecutive naturals, for example, 240925780 + ... + 240926043.

It is an arithmetic number, because the mean of its divisors is an integer number (6745925536).

Almost surely, 2^63604440636 is an apocalyptic number.

63604440636 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

63604440636 is an abundant number, since it is smaller than the sum of its proper divisors (98297772228).

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

63604440636 is a wasteful number, since it uses less digits than its factorization.

63604440636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481851841 (or 481851839 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 42.

The spelling of 63604440636 in words is "sixty-three billion, six hundred four million, four hundred forty thousand, six hundred thirty-six".