865144445 has 16 divisors (see below), whose sum is σ = 1142951040. Its totient is φ = 623419200.

The previous prime is 865144439. The next prime is 865144481. The reversal of 865144445 is 544441568.

It is not a de Polignac number, because 865144445 - 2⁶ = 865144381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66161 + ... + 78150.

It is an arithmetic number, because the mean of its divisors is an integer number (71434440).

Almost surely, 2^865144445 is an apocalyptic number.

It is an amenable number.

865144445 is a deficient number, since it is larger than the sum of its proper divisors (277806595).

865144445 is a wasteful number, since it uses less digits than its factorization.

865144445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144436.

The product of its digits is 307200, while the sum is 41.

The square root of 865144445 is about 29413.3378758685. The cubic root of 865144445 is about 952.8609764732.

The spelling of 865144445 in words is "eight hundred sixty-five million, one hundred forty-four thousand, four hundred forty-five".