68640908184 has 48 divisors (see below), whose sum is σ = 187366283520. Its totient is φ = 22700139840.

The previous prime is 68640908183. The next prime is 68640908191. The reversal of 68640908184 is 48180904686.

68640908184 is a `hidden beast` number, since 6 + 86 + 409 + 0 + 81 + 84 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 68640908184.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68640908183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3744187 + ... + 3762474.

It is an arithmetic number, because the mean of its divisors is an integer number (3903464240).

Almost surely, 2^68640908184 is an apocalyptic number.

It is an amenable number.

68640908184 is an abundant number, since it is smaller than the sum of its proper divisors (118725375336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68640908184 is a wasteful number, since it uses less digits than its factorization.

68640908184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7506800 (or 7506793 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 68640908184 in words is "sixty-eight billion, six hundred forty million, nine hundred eight thousand, one hundred eighty-four".