68540330186 has 4 divisors (see below), whose sum is σ = 102810495282. Its totient is φ = 34270165092.

The previous prime is 68540330179. The next prime is 68540330237. The reversal of 68540330186 is 68103304586.

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

It can be written as a sum of positive squares in only one way, i.e., 62552511025 + 5987819161 = 250105^2 + 77381^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17135082545 + ... + 17135082548.

Almost surely, 2^68540330186 is an apocalyptic number.

68540330186 is a deficient number, since it is larger than the sum of its proper divisors (34270165096).

68540330186 is a wasteful number, since it uses less digits than its factorization.

68540330186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34270165095.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 68540330186 in words is "sixty-eight billion, five hundred forty million, three hundred thirty thousand, one hundred eighty-six".