31000068600065 has 4 divisors (see below), whose sum is σ = 37200082320084. Its totient is φ = 24800054880048.

The previous prime is 31000068600031. The next prime is 31000068600077. The reversal of 31000068600065 is 56000686000013.

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 9233430286336 + 21766638313729 = 3038656^2 + 4665473^2 .

It is a cyclic number.

It is not a de Polignac number, because 31000068600065 - 2⁴⁰ = 29900556972289 is a prime.

It is a super-2 number, since 2×31000068600065² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31000068599998 and 31000068600034.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3100006860002 + ... + 3100006860011.

It is an arithmetic number, because the mean of its divisors is an integer number (9300020580021).

Almost surely, 2^{31000068600065} is an apocalyptic number.

It is an amenable number.

31000068600065 is a deficient number, since it is larger than the sum of its proper divisors (6200013720019).

31000068600065 is an equidigital number, since it uses as much as digits as its factorization.

31000068600065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6200013720018.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 31000068600065 in words is "thirty-one trillion, sixty-eight million, six hundred thousand, sixty-five".