64444416143 has 8 divisors (see below), whose sum is σ = 65369041920. Its totient is φ = 63520261560.

The previous prime is 64444416139. The next prime is 64444416191. The reversal of 64444416143 is 34161444446.

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 64444416143 - 2² = 64444416139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64444416143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64444416943) 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, 162446 + ... + 394052.

It is an arithmetic number, because the mean of its divisors is an integer number (8171130240).

Almost surely, 2^64444416143 is an apocalyptic number.

64444416143 is a deficient number, since it is larger than the sum of its proper divisors (924625777).

64444416143 is a wasteful number, since it uses less digits than its factorization.

64444416143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235597.

The product of its digits is 442368, while the sum is 41.

The spelling of 64444416143 in words is "sixty-four billion, four hundred forty-four million, four hundred sixteen thousand, one hundred forty-three".