67013485729 has 4 divisors (see below), whose sum is σ = 67113060676. Its totient is φ = 66913910784.

The previous prime is 67013485727. The next prime is 67013485739. The reversal of 67013485729 is 92758431076.

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 12094500625 + 54918985104 = 109975^2 + 234348^2 .

It is a 5-Lehmer number, since φ(67013485729) divides (67013485729-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 67013485729 - 2¹ = 67013485727 is a prime.

It is a super-2 number, since 2×67013485729² (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 (67013485727) 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, 49786464 + ... + 49787809.

It is an arithmetic number, because the mean of its divisors is an integer number (16778265169).

It is a 2-persistent number, because it is pandigital, and so is 2⋅67013485729 = 134026971458, but 3⋅67013485729 = 201040457187 is not.

Almost surely, 2^67013485729 is an apocalyptic number.

It is an amenable number.

67013485729 is a deficient number, since it is larger than the sum of its proper divisors (99574947).

67013485729 is an equidigital number, since it uses as much as digits as its factorization.

67013485729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99574946.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 67013485729 in words is "sixty-seven billion, thirteen million, four hundred eighty-five thousand, seven hundred twenty-nine".