64446040066039 has 8 divisors (see below), whose sum is σ = 68950034239280. Its totient is φ = 60053255625600.

The previous prime is 64446040066027. The next prime is 64446040066097. The reversal of 64446040066039 is 93066004064446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64446040066039 - 2⁵ = 64446040066007 is a prime.

It is a super-2 number, since 2×64446040066039² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64446040063039) 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, 27802432002 + ... + 27802434319.

It is an arithmetic number, because the mean of its divisors is an integer number (8618754279910).

Almost surely, 2^{64446040066039} is an apocalyptic number.

64446040066039 is a deficient number, since it is larger than the sum of its proper divisors (4503994173241).

64446040066039 is a wasteful number, since it uses less digits than its factorization.

64446040066039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55604866401.

The product of its (nonzero) digits is 8957952, while the sum is 52.

The spelling of 64446040066039 in words is "sixty-four trillion, four hundred forty-six billion, forty million, sixty-six thousand, thirty-nine".