445144861 has 6 divisors (see below), whose sum is σ = 517821630. Its totient is φ = 381552696.

The previous prime is 445144823. The next prime is 445144873. The reversal of 445144861 is 168441544.

It can be written as a sum of positive squares in only one way, i.e., 402764761 + 42380100 = 20069^2 + 6510^2 .

It is a de Polignac number, because none of the positive numbers 2^k-445144861 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 445144861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445144261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4542246 + ... + 4542343.

It is an arithmetic number, because the mean of its divisors is an integer number (86303605).

Almost surely, 2^445144861 is an apocalyptic number.

It is an amenable number.

445144861 is a deficient number, since it is larger than the sum of its proper divisors (72676769).

445144861 is an equidigital number, since it uses as much as digits as its factorization.

445144861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9084603 (or 9084596 counting only the distinct ones).

The product of its digits is 61440, while the sum is 37.

The square root of 445144861 is about 21098.4563653363. The cubic root of 445144861 is about 763.5435063648.

The spelling of 445144861 in words is "four hundred forty-five million, one hundred forty-four thousand, eight hundred sixty-one".