68810161 has 6 divisors (see below), whose sum is σ = 80044530. Its totient is φ = 58980096.

The previous prime is 68810129. The next prime is 68810167. The reversal of 68810161 is 16101886.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 68807025 + 3136 = 8295^2 + 56^2 .

It is not a de Polignac number, because 68810161 - 2⁵ = 68810129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68810167) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 702096 + ... + 702193.

It is an arithmetic number, because the mean of its divisors is an integer number (13340755).

Almost surely, 2^68810161 is an apocalyptic number.

It is an amenable number.

68810161 is a deficient number, since it is larger than the sum of its proper divisors (11234369).

68810161 is a wasteful number, since it uses less digits than its factorization.

68810161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404303 (or 1404296 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 68810161 is about 8295.1890273821. The cubic root of 68810161 is about 409.7800942487.

The spelling of 68810161 in words is "sixty-eight million, eight hundred ten thousand, one hundred sixty-one".