68558401 has 4 divisors (see below), whose sum is σ = 68575572. Its totient is φ = 68541232.

The previous prime is 68558389. The next prime is 68558411. The reversal of 68558401 is 10485586.

It is a Cunningham number, because it is equal to 8280²+1.

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 36917776 + 31640625 = 6076^2 + 5625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68558401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68558411) 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, 891 + ... + 11743.

It is an arithmetic number, because the mean of its divisors is an integer number (17143893).

Almost surely, 2^68558401 is an apocalyptic number.

It is an amenable number.

68558401 is a deficient number, since it is larger than the sum of its proper divisors (17171).

68558401 is a wasteful number, since it uses less digits than its factorization.

68558401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17170.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 68558401 is about 8280.0000603865. Note that the first 4 decimals coincide. The cubic root of 68558401 is about 409.2797208948.

The spelling of 68558401 in words is "sixty-eight million, five hundred fifty-eight thousand, four hundred one".