400444484845 has 4 divisors (see below), whose sum is σ = 480533381820. Its totient is φ = 320355587872.

The previous prime is 400444484831. The next prime is 400444484849. The reversal of 400444484845 is 548484444004.

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 196296846916 + 204147637929 = 443054^2 + 451827^2 .

It is a cyclic number.

It is not a de Polignac number, because 400444484845 - 2¹¹ = 400444482797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400444484849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40044448480 + ... + 40044448489.

It is an arithmetic number, because the mean of its divisors is an integer number (120133345455).

Almost surely, 2^400444484845 is an apocalyptic number.

It is an amenable number.

400444484845 is a deficient number, since it is larger than the sum of its proper divisors (80088896975).

400444484845 is an equidigital number, since it uses as much as digits as its factorization.

400444484845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80088896974.

The product of its (nonzero) digits is 5242880, while the sum is 49.

The spelling of 400444484845 in words is "four hundred billion, four hundred forty-four million, four hundred eighty-four thousand, eight hundred forty-five".