68044169009 has 4 divisors (see below), whose sum is σ = 72046767204. Its totient is φ = 64041570816.

The previous prime is 68044169003. The next prime is 68044169021. The reversal of 68044169009 is 90096144086.

It is a happy number.

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 31428198400 + 36615970609 = 177280^2 + 191353^2 .

It is a cyclic number.

It is not a de Polignac number, because 68044169009 - 2¹² = 68044164913 is a prime.

It is a super-2 number, since 2×68044169009² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68044169003) 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, 2001299072 + ... + 2001299105.

It is an arithmetic number, because the mean of its divisors is an integer number (18011691801).

Almost surely, 2^68044169009 is an apocalyptic number.

It is an amenable number.

68044169009 is a deficient number, since it is larger than the sum of its proper divisors (4002598195).

68044169009 is a wasteful number, since it uses less digits than its factorization.

68044169009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002598194.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 68044169009 in words is "sixty-eight billion, forty-four million, one hundred sixty-nine thousand, nine".