440042065161665 has 8 divisors (see below), whose sum is σ = 533983629634920. Its totient is φ = 348078217835392.

The previous prime is 440042065161659. The next prime is 440042065161763. The reversal of 440042065161665 is 566161560240044.

It can be written as a sum of positive squares in 4 ways, for example, as 3165349814449 + 436876715347216 = 1779143^2 + 20901596^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 440042065161665 - 2⁴ = 440042065161649 is a prime.

It is a super-2 number, since 2×440042065161665² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494429286254 + ... + 494429287143.

It is an arithmetic number, because the mean of its divisors is an integer number (66747953704365).

Almost surely, 2^{440042065161665} is an apocalyptic number.

It is an amenable number.

440042065161665 is a deficient number, since it is larger than the sum of its proper divisors (93941564473255).

440042065161665 is an equidigital number, since it uses as much as digits as its factorization.

440042065161665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988858573491.

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 440042065161665 in words is "four hundred forty trillion, forty-two billion, sixty-five million, one hundred sixty-one thousand, six hundred sixty-five".