68140944089 has 4 divisors (see below), whose sum is σ = 71103593856. Its totient is φ = 65178294324.

The previous prime is 68140944019. The next prime is 68140944107. The reversal of 68140944089 is 98044904186.

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 68140944089 - 2²⁰ = 68139895513 is a prime.

It is a super-2 number, since 2×68140944089² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68140944089.

It is not an unprimeable number, because it can be changed into a prime (68140944019) 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, 1481324849 + ... + 1481324894.

It is an arithmetic number, because the mean of its divisors is an integer number (17775898464).

Almost surely, 2^68140944089 is an apocalyptic number.

It is an amenable number.

68140944089 is a deficient number, since it is larger than the sum of its proper divisors (2962649767).

68140944089 is a wasteful number, since it uses less digits than its factorization.

68140944089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962649766.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 68140944089 in words is "sixty-eight billion, one hundred forty million, nine hundred forty-four thousand, eighty-nine".