63441335440 has 80 divisors (see below), whose sum is σ = 168660240768. Its totient is φ = 21740018688.

The previous prime is 63441335341. The next prime is 63441335443. The reversal of 63441335440 is 4453314436.

63441335440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 63441335440.

It is not an unprimeable number, because it can be changed into a prime (63441335443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1087659 + ... + 1144501.

Almost surely, 2^63441335440 is an apocalyptic number.

It is an amenable number.

63441335440 is an abundant number, since it is smaller than the sum of its proper divisors (105218905328).

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

63441335440 is a wasteful number, since it uses less digits than its factorization.

63441335440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58856 (or 58850 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 63441335440 its reverse (4453314436), we get a palindrome (67894649876).

The spelling of 63441335440 in words is "sixty-three billion, four hundred forty-one million, three hundred thirty-five thousand, four hundred forty".