64577881606240 has 144 divisors (see below), whose sum is σ = 163797385178448. Its totient is φ = 24040272503808.

The previous prime is 64577881606163. The next prime is 64577881606243. The reversal of 64577881606240 is 4260618877546.

64577881606240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64577881606243) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 7178742 + ... + 13442101.

It is an arithmetic number, because the mean of its divisors is an integer number (1137481841517).

Almost surely, 2^{64577881606240} is an apocalyptic number.

It is an amenable number.

64577881606240 is an abundant number, since it is smaller than the sum of its proper divisors (99219503572208).

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

64577881606240 is a wasteful number, since it uses less digits than its factorization.

64577881606240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20620941 (or 20620910 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 64.

The spelling of 64577881606240 in words is "sixty-four trillion, five hundred seventy-seven billion, eight hundred eighty-one million, six hundred six thousand, two hundred forty".