63544400020 has 24 divisors (see below), whose sum is σ = 133448251104. Its totient is φ = 25416805536.

The previous prime is 63544399987. The next prime is 63544400077. The reversal of 63544400020 is 2000444536.

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 7 ways as a sum of consecutive naturals, for example, 762867 + ... + 842053.

It is an arithmetic number, because the mean of its divisors is an integer number (5560343796).

Almost surely, 2^63544400020 is an apocalyptic number.

It is an amenable number.

63544400020 is an abundant number, since it is smaller than the sum of its proper divisors (69903851084).

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

63544400020 is a wasteful number, since it uses less digits than its factorization.

63544400020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119319 (or 119317 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 63544400020 its reverse (2000444536), we get a palindrome (65544844556).

The spelling of 63544400020 in words is "sixty-three billion, five hundred forty-four million, four hundred thousand, twenty".