68218650 has 36 divisors (see below), whose sum is σ = 183281982. Its totient is φ = 18191520.

The previous prime is 68218649. The next prime is 68218687. The reversal of 68218650 is 5681286.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 63250209 + 4968441 = 7953^2 + 2229^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 75349 + ... + 76248.

Almost surely, 2^68218650 is an apocalyptic number.

68218650 is an abundant number, since it is smaller than the sum of its proper divisors (115063332).

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

68218650 is a wasteful number, since it uses less digits than its factorization.

68218650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151615 (or 151607 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 68218650 is about 8259.4582146773. The cubic root of 68218650 is about 408.6025195294.

The spelling of 68218650 in words is "sixty-eight million, two hundred eighteen thousand, six hundred fifty".