64553218461040 has 80 divisors (see below), whose sum is σ = 156668485789440. Its totient is φ = 24707574650880.

The previous prime is 64553218461031. The next prime is 64553218461059. The reversal of 64553218461040 is 4016481235546.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146012559 + ... + 146453998.

It is an arithmetic number, because the mean of its divisors is an integer number (1958356072368).

Almost surely, 2^{64553218461040} is an apocalyptic number.

It is an amenable number.

64553218461040 is an abundant number, since it is smaller than the sum of its proper divisors (92115267328400).

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

64553218461040 is a wasteful number, since it uses less digits than its factorization.

64553218461040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292466690 (or 292466684 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 49.

Adding to 64553218461040 its reverse (4016481235546), we get a palindrome (68569699696586).

The spelling of 64553218461040 in words is "sixty-four trillion, five hundred fifty-three billion, two hundred eighteen million, four hundred sixty-one thousand, forty".