64205066508 has 48 divisors (see below), whose sum is σ = 163453833984. Its totient is φ = 19453371840.

The previous prime is 64205066503. The next prime is 64205066533. The reversal of 64205066508 is 80566050246.

It is a self number, because there is not a number n which added to its sum of digits gives 64205066508.

It is not an unprimeable number, because it can be changed into a prime (64205066501) 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 15 ways as a sum of consecutive naturals, for example, 1048266 + ... + 1107822.

It is an arithmetic number, because the mean of its divisors is an integer number (3405288208).

Almost surely, 2^64205066508 is an apocalyptic number.

It is an amenable number.

64205066508 is an abundant number, since it is smaller than the sum of its proper divisors (99248767476).

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

64205066508 is a wasteful number, since it uses less digits than its factorization.

64205066508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67742 (or 67740 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 64205066508 in words is "sixty-four billion, two hundred five million, sixty-six thousand, five hundred eight".