67531320013 has 8 divisors (see below), whose sum is σ = 72136529208. Its totient is φ = 62996419584.

The previous prime is 67531320011. The next prime is 67531320067. The reversal of 67531320013 is 31002313576.

It can be written as a sum of positive squares in 4 ways, for example, as 1717522249 + 65813797764 = 41443^2 + 256542^2 .

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 67531320013 - 2¹ = 67531320011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67531320011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17575206 + ... + 17579047.

It is an arithmetic number, because the mean of its divisors is an integer number (9017066151).

Almost surely, 2^67531320013 is an apocalyptic number.

It is an amenable number.

67531320013 is a deficient number, since it is larger than the sum of its proper divisors (4605209195).

67531320013 is a wasteful number, since it uses less digits than its factorization.

67531320013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35154383.

The product of its (nonzero) digits is 11340, while the sum is 31.

Adding to 67531320013 its reverse (31002313576), we get a palindrome (98533633589).

The spelling of 67531320013 in words is "sixty-seven billion, five hundred thirty-one million, three hundred twenty thousand, thirteen".