67124132809 has 4 divisors (see below), whose sum is σ = 67235820820. Its totient is φ = 67012444800.

The previous prime is 67124132797. The next prime is 67124132813. The reversal of 67124132809 is 90823142176.

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 34797171600 + 32326961209 = 186540^2 + 179797^2 .

It is a cyclic number.

It is not a de Polignac number, because 67124132809 - 2¹⁹ = 67123608521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67124132849) 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, 55843104 + ... + 55844305.

It is an arithmetic number, because the mean of its divisors is an integer number (16808955205).

Almost surely, 2^67124132809 is an apocalyptic number.

It is an amenable number.

67124132809 is a deficient number, since it is larger than the sum of its proper divisors (111688011).

67124132809 is a wasteful number, since it uses less digits than its factorization.

67124132809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111688010.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 67124132809 in words is "sixty-seven billion, one hundred twenty-four million, one hundred thirty-two thousand, eight hundred nine".