441193978369 has 4 divisors (see below), whose sum is σ = 456407563860. Its totient is φ = 425980392880.

The previous prime is 441193978361. The next prime is 441193978387. The reversal of 441193978369 is 963879391144.

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 335658009600 + 105535968769 = 579360^2 + 324863^2 .

It is a cyclic number.

It is not a de Polignac number, because 441193978369 - 2³ = 441193978361 is a prime.

It is a super-2 number, since 2×441193978369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 441193978369.

It is not an unprimeable number, because it can be changed into a prime (441193978361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7606792702 + ... + 7606792759.

It is an arithmetic number, because the mean of its divisors is an integer number (114101890965).

Almost surely, 2^441193978369 is an apocalyptic number.

It is an amenable number.

441193978369 is a deficient number, since it is larger than the sum of its proper divisors (15213585491).

441193978369 is a wasteful number, since it uses less digits than its factorization.

441193978369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15213585490.

The product of its digits is 35271936, while the sum is 64.

The spelling of 441193978369 in words is "four hundred forty-one billion, one hundred ninety-three million, nine hundred seventy-eight thousand, three hundred sixty-nine".