64663655448 has 128 divisors (see below), whose sum is σ = 189383040000. Its totient is φ = 18012948480.

The previous prime is 64663655437. The next prime is 64663655449. The reversal of 64663655448 is 84455636646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64663655449) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 20999973 + ... + 21003051.

It is an arithmetic number, because the mean of its divisors is an integer number (1479555000).

Almost surely, 2^64663655448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64663655448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94691520000).

64663655448 is an abundant number, since it is smaller than the sum of its proper divisors (124719384552).

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

64663655448 is a wasteful number, since it uses less digits than its factorization.

64663655448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185 (or 6181 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 57.

The spelling of 64663655448 in words is "sixty-four billion, six hundred sixty-three million, six hundred fifty-five thousand, four hundred forty-eight".