64988558900 has 18 divisors (see below), whose sum is σ = 141025173030. Its totient is φ = 25995423520.

The previous prime is 64988558861. The next prime is 64988558909. The reversal of 64988558900 is 985588946.

It can be written as a sum of positive squares in 3 ways, for example, as 17413969444 + 47574589456 = 131962^2 + 218116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64988558909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 324942695 + ... + 324942894.

It is an arithmetic number, because the mean of its divisors is an integer number (7834731835).

Almost surely, 2^64988558900 is an apocalyptic number.

It is an amenable number.

64988558900 is an abundant number, since it is smaller than the sum of its proper divisors (76036614130).

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

64988558900 is a wasteful number, since it uses less digits than its factorization.

64988558900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649885603 (or 649885596 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 62.

The spelling of 64988558900 in words is "sixty-four billion, nine hundred eighty-eight million, five hundred fifty-eight thousand, nine hundred".