68532161 has 4 divisors (see below), whose sum is σ = 68670000. Its totient is φ = 68394324.

The previous prime is 68532077. The next prime is 68532169. The reversal of 68532161 is 16123586.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68532161 - 2¹⁰ = 68531137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68532169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68171 + ... + 69168.

It is an arithmetic number, because the mean of its divisors is an integer number (17167500).

Almost surely, 2^68532161 is an apocalyptic number.

It is an amenable number.

68532161 is a deficient number, since it is larger than the sum of its proper divisors (137839).

68532161 is a wasteful number, since it uses less digits than its factorization.

68532161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137838.

The product of its digits is 8640, while the sum is 32.

The square root of 68532161 is about 8278.4153676896. The cubic root of 68532161 is about 409.2274984093.

The spelling of 68532161 in words is "sixty-eight million, five hundred thirty-two thousand, one hundred sixty-one".