68218500187 has 4 divisors (see below), whose sum is σ = 68226242656. Its totient is φ = 68210757720.

The previous prime is 68218500169. The next prime is 68218500241. The reversal of 68218500187 is 78100581286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68218500187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68218500587) 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, 3858003 + ... + 3875644.

It is an arithmetic number, because the mean of its divisors is an integer number (17056560664).

Almost surely, 2^68218500187 is an apocalyptic number.

68218500187 is a deficient number, since it is larger than the sum of its proper divisors (7742469).

68218500187 is an equidigital number, since it uses as much as digits as its factorization.

68218500187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742468.

The product of its (nonzero) digits is 215040, while the sum is 46.

The spelling of 68218500187 in words is "sixty-eight billion, two hundred eighteen million, five hundred thousand, one hundred eighty-seven".