444400784789 has 4 divisors (see below), whose sum is σ = 478585460556. Its totient is φ = 410216109024.

The previous prime is 444400784767. The next prime is 444400784803. The reversal of 444400784789 is 987487004444.

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 115202542225 + 329198242564 = 339415^2 + 573758^2 .

It is a cyclic number.

It is not a de Polignac number, because 444400784789 - 2²⁰ = 444399736213 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 (444400784719) 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, 17092337864 + ... + 17092337889.

It is an arithmetic number, because the mean of its divisors is an integer number (119646365139).

Almost surely, 2^444400784789 is an apocalyptic number.

It is an amenable number.

444400784789 is a deficient number, since it is larger than the sum of its proper divisors (34184675767).

444400784789 is a wasteful number, since it uses less digits than its factorization.

444400784789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34184675766.

The product of its (nonzero) digits is 28901376, while the sum is 59.

The spelling of 444400784789 in words is "four hundred forty-four billion, four hundred million, seven hundred eighty-four thousand, seven hundred eighty-nine".