445812391709 has 16 divisors (see below), whose sum is σ = 449862502320. Its totient is φ = 441784765440.

The previous prime is 445812391681. The next prime is 445812391721. The reversal of 445812391709 is 907193218544.

It can be written as a sum of positive squares in 8 ways, for example, as 112277266084 + 333535125625 = 335078^2 + 577525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445812391709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445812301709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56939807 + ... + 56947635.

It is an arithmetic number, because the mean of its divisors is an integer number (28116406395).

Almost surely, 2^445812391709 is an apocalyptic number.

It is an amenable number.

445812391709 is a deficient number, since it is larger than the sum of its proper divisors (4050110611).

445812391709 is a wasteful number, since it uses less digits than its factorization.

445812391709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9200.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 445812391709 in words is "four hundred forty-five billion, eight hundred twelve million, three hundred ninety-one thousand, seven hundred nine".