64166444143 has 8 divisors (see below), whose sum is σ = 65736100080. Its totient is φ = 62597008320.

The previous prime is 64166444129. The next prime is 64166444161. The reversal of 64166444143 is 34144466146.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64166444143 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 64166444143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64166444113) 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, 641653 + ... + 734881.

It is an arithmetic number, because the mean of its divisors is an integer number (8217012510).

Almost surely, 2^64166444143 is an apocalyptic number.

64166444143 is a deficient number, since it is larger than the sum of its proper divisors (1569655937).

64166444143 is a wasteful number, since it uses less digits than its factorization.

64166444143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110057.

The product of its digits is 663552, while the sum is 43.

The spelling of 64166444143 in words is "sixty-four billion, one hundred sixty-six million, four hundred forty-four thousand, one hundred forty-three".