67835873921 has 4 divisors (see below), whose sum is σ = 67846129200. Its totient is φ = 67825618644.

The previous prime is 67835873893. The next prime is 67835873953. The reversal of 67835873921 is 12937853876.

It is a happy number.

67835873921 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 67835873921 - 2¹⁸ = 67835611777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67835873621) 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, 5117711 + ... + 5130948.

It is an arithmetic number, because the mean of its divisors is an integer number (16961532300).

Almost surely, 2^67835873921 is an apocalyptic number.

It is an amenable number.

67835873921 is a deficient number, since it is larger than the sum of its proper divisors (10255279).

67835873921 is a wasteful number, since it uses less digits than its factorization.

67835873921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10255278.

The product of its digits is 15240960, while the sum is 59.

The spelling of 67835873921 in words is "sixty-seven billion, eight hundred thirty-five million, eight hundred seventy-three thousand, nine hundred twenty-one".