64520361354220 has 24 divisors (see below), whose sum is σ = 135656200083600. Its totient is φ = 25777012876992.

The previous prime is 64520361354173. The next prime is 64520361354259. The reversal of 64520361354220 is 2245316302546.

64520361354220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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, 1945712050 + ... + 1945745209.

It is an arithmetic number, because the mean of its divisors is an integer number (5652341670150).

Almost surely, 2^{64520361354220} is an apocalyptic number.

It is an amenable number.

64520361354220 is an abundant number, since it is smaller than the sum of its proper divisors (71135838729380).

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

64520361354220 is a wasteful number, since it uses less digits than its factorization.

64520361354220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891458097 (or 3891458095 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 43.

Adding to 64520361354220 its reverse (2245316302546), we get a palindrome (66765677656766).

The spelling of 64520361354220 in words is "sixty-four trillion, five hundred twenty billion, three hundred sixty-one million, three hundred fifty-four thousand, two hundred twenty".