67853772121 has 8 divisors (see below), whose sum is σ = 70338948480. Its totient is φ = 65402874288.

The previous prime is 67853772109. The next prime is 67853772167. The reversal of 67853772121 is 12127735876.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67853772121 - 2²⁷ = 67719554393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67853772521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8565601 + ... + 8573518.

It is an arithmetic number, because the mean of its divisors is an integer number (8792368560).

Almost surely, 2^67853772121 is an apocalyptic number.

It is an amenable number.

67853772121 is a deficient number, since it is larger than the sum of its proper divisors (2485176359).

67853772121 is a wasteful number, since it uses less digits than its factorization.

67853772121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17139263.

The product of its digits is 987840, while the sum is 49.

The spelling of 67853772121 in words is "sixty-seven billion, eight hundred fifty-three million, seven hundred seventy-two thousand, one hundred twenty-one".