445445481865 has 8 divisors (see below), whose sum is σ = 534564579528. Its totient is φ = 356336384640.

The previous prime is 445445481823. The next prime is 445445481913. The reversal of 445445481865 is 568184544544.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1754939664 + 443690542201 = 41892^2 + 666101^2 .

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

It is not a de Polignac number, because 445445481865 - 2¹⁹ = 445444957577 is a prime.

It is a Duffinian number.

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, 2401762 + ... + 2580571.

It is an arithmetic number, because the mean of its divisors is an integer number (66820572441).

Almost surely, 2^445445481865 is an apocalyptic number.

It is an amenable number.

445445481865 is a deficient number, since it is larger than the sum of its proper divisors (89119097663).

445445481865 is a wasteful number, since it uses less digits than its factorization.

445445481865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000219.

The product of its digits is 49152000, while the sum is 58.

The spelling of 445445481865 in words is "four hundred forty-five billion, four hundred forty-five million, four hundred eighty-one thousand, eight hundred sixty-five".