440778068081 has 6 divisors (see below), whose sum is σ = 477292227750. Its totient is φ = 406872062688.

The previous prime is 440778068077. The next prime is 440778068111. The reversal of 440778068081 is 180860877044.

It can be written as a sum of positive squares in 3 ways, for example, as 1462297600 + 439315770481 = 38240^2 + 662809^2 .

It is not a de Polignac number, because 440778068081 - 2² = 440778068077 is a prime.

It is a super-2 number, since 2×440778068081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (440778068681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1304076956 + ... + 1304077293.

It is an arithmetic number, because the mean of its divisors is an integer number (79548704625).

Almost surely, 2^440778068081 is an apocalyptic number.

It is an amenable number.

440778068081 is a deficient number, since it is larger than the sum of its proper divisors (36514159669).

440778068081 is a wasteful number, since it uses less digits than its factorization.

440778068081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608154275 (or 2608154262 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 53.

The spelling of 440778068081 in words is "four hundred forty billion, seven hundred seventy-eight million, sixty-eight thousand, eighty-one".