444477280465 has 4 divisors (see below), whose sum is σ = 533372736564. Its totient is φ = 355581824368.

The previous prime is 444477280421. The next prime is 444477280531. The reversal of 444477280465 is 564082774444.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 274567616064 + 169909664401 = 523992^2 + 412201^2 .

It is a cyclic number.

It is not a de Polignac number, because 444477280465 - 2⁷ = 444477280337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44447728042 + ... + 44447728051.

It is an arithmetic number, because the mean of its divisors is an integer number (133343184141).

Almost surely, 2^444477280465 is an apocalyptic number.

It is an amenable number.

444477280465 is a deficient number, since it is larger than the sum of its proper divisors (88895456099).

444477280465 is an equidigital number, since it uses as much as digits as its factorization.

444477280465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88895456098.

The product of its (nonzero) digits is 24084480, while the sum is 55.

The spelling of 444477280465 in words is "four hundred forty-four billion, four hundred seventy-seven million, two hundred eighty thousand, four hundred sixty-five".