440379661823 has 4 divisors (see below), whose sum is σ = 440383480320. Its totient is φ = 440375843328.

The previous prime is 440379661817. The next prime is 440379661829. The reversal of 440379661823 is 328166973044.

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

It is an interprime number because it is at equal distance from previous prime (440379661817) and next prime (440379661829).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440379661823 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 (440379661829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1730690 + ... + 1968767.

It is an arithmetic number, because the mean of its divisors is an integer number (110095870080).

Almost surely, 2^440379661823 is an apocalyptic number.

440379661823 is a deficient number, since it is larger than the sum of its proper divisors (3818497).

440379661823 is a wasteful number, since it uses less digits than its factorization.

440379661823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818496.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 440379661823 in words is "four hundred forty billion, three hundred seventy-nine million, six hundred sixty-one thousand, eight hundred twenty-three".