68532641 has 4 divisors (see below), whose sum is σ = 69211284. Its totient is φ = 67854000.

The previous prime is 68532637. The next prime is 68532647. The reversal of 68532641 is 14623586.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55056400 + 13476241 = 7420^2 + 3671^2 .

It is a cyclic number.

It is not a de Polignac number, because 68532641 - 2² = 68532637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68532647) 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, 339170 + ... + 339371.

It is an arithmetic number, because the mean of its divisors is an integer number (17302821).

Almost surely, 2^68532641 is an apocalyptic number.

It is an amenable number.

68532641 is a deficient number, since it is larger than the sum of its proper divisors (678643).

68532641 is a wasteful number, since it uses less digits than its factorization.

68532641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678642.

The product of its digits is 34560, while the sum is 35.

The square root of 68532641 is about 8278.4443586945. Note that the first 3 decimals coincide. The cubic root of 68532641 is about 409.2284538183.

The spelling of 68532641 in words is "sixty-eight million, five hundred thirty-two thousand, six hundred forty-one".