64645883884 has 24 divisors (see below), whose sum is σ = 120845078928. Its totient is φ = 30152371200.

The previous prime is 64645883881. The next prime is 64645883921. The reversal of 64645883884 is 48838854646.

It is a super-3 number, since 3×64645883884³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (64645883881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4198842 + ... + 4214209.

It is an arithmetic number, because the mean of its divisors is an integer number (5035211622).

Almost surely, 2^64645883884 is an apocalyptic number.

It is an amenable number.

64645883884 is a deficient number, since it is larger than the sum of its proper divisors (56199195044).

64645883884 is a wasteful number, since it uses less digits than its factorization.

64645883884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8413185 (or 8413183 counting only the distinct ones).

The product of its digits is 141557760, while the sum is 64.

The spelling of 64645883884 in words is "sixty-four billion, six hundred forty-five million, eight hundred eighty-three thousand, eight hundred eighty-four".