67940618789 has 4 divisors (see below), whose sum is σ = 67943761824. Its totient is φ = 67937475756.

The previous prime is 67940618719. The next prime is 67940618791. The reversal of 67940618789 is 98781604976.

67940618789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67940618789 - 2²⁰ = 67939570213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67940618719) 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, 1538867 + ... + 1582400.

It is an arithmetic number, because the mean of its divisors is an integer number (16985940456).

Almost surely, 2^67940618789 is an apocalyptic number.

It is an amenable number.

67940618789 is a deficient number, since it is larger than the sum of its proper divisors (3143035).

67940618789 is a wasteful number, since it uses less digits than its factorization.

67940618789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143034.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The spelling of 67940618789 in words is "sixty-seven billion, nine hundred forty million, six hundred eighteen thousand, seven hundred eighty-nine".