64445744106185 has 8 divisors (see below), whose sum is σ = 83283730845000. Its totient is φ = 47590703339904.

The previous prime is 64445744106179. The next prime is 64445744106253. The reversal of 64445744106185 is 58160144754446.

It can be written as a sum of positive squares in 4 ways, for example, as 945452854336 + 63500291251849 = 972344^2 + 7968707^2 .

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 64445744106185 - 2⁴ = 64445744106169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495736493060 + ... + 495736493189.

It is an arithmetic number, because the mean of its divisors is an integer number (10410466355625).

Almost surely, 2^{64445744106185} is an apocalyptic number.

64445744106185 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64445744106185 is a deficient number, since it is larger than the sum of its proper divisors (18837986738815).

64445744106185 is a wasteful number, since it uses less digits than its factorization.

64445744106185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991472986267.

The product of its (nonzero) digits is 51609600, while the sum is 59.

The spelling of 64445744106185 in words is "sixty-four trillion, four hundred forty-five billion, seven hundred forty-four million, one hundred six thousand, one hundred eighty-five".