64971845684 has 24 divisors (see below), whose sum is σ = 114771000288. Its totient is φ = 32181383520.

The previous prime is 64971845681. The next prime is 64971845707. The reversal of 64971845684 is 48654817946.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64971845681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51587 + ... + 364149.

It is an arithmetic number, because the mean of its divisors is an integer number (4782125012).

Almost surely, 2^64971845684 is an apocalyptic number.

It is an amenable number.

64971845684 is a deficient number, since it is larger than the sum of its proper divisors (49799154604).

64971845684 is a wasteful number, since it uses less digits than its factorization.

64971845684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313055 (or 313053 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 62.

The spelling of 64971845684 in words is "sixty-four billion, nine hundred seventy-one million, eight hundred forty-five thousand, six hundred eighty-four".