67979878911 has 16 divisors (see below), whose sum is σ = 115098208000. Its totient is φ = 38845644984.

The previous prime is 67979878909. The next prime is 67979878913. The reversal of 67979878911 is 11987897976.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (67979878909) and next prime (67979878913).

It is not a de Polignac number, because 67979878911 - 2¹ = 67979878909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67979878911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67979878913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179840761 + ... + 179841138.

It is an arithmetic number, because the mean of its divisors is an integer number (7193638000).

Almost surely, 2^67979878911 is an apocalyptic number.

67979878911 is a deficient number, since it is larger than the sum of its proper divisors (47118329089).

67979878911 is a wasteful number, since it uses less digits than its factorization.

67979878911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359681915 (or 359681909 counting only the distinct ones).

The product of its digits is 96018048, while the sum is 72.

The spelling of 67979878911 in words is "sixty-seven billion, nine hundred seventy-nine million, eight hundred seventy-eight thousand, nine hundred eleven".