68446521 has 36 divisors (see below), whose sum is σ = 116818416. Its totient is φ = 38282400.

The previous prime is 68446513. The next prime is 68446529. The reversal of 68446521 is 12564486.

It is an interprime number because it is at equal distance from previous prime (68446513) and next prime (68446529).

It is not a de Polignac number, because 68446521 - 2³ = 68446513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68446529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14686 + ... + 18776.

It is an arithmetic number, because the mean of its divisors is an integer number (3244956).

Almost surely, 2^68446521 is an apocalyptic number.

It is an amenable number.

68446521 is a deficient number, since it is larger than the sum of its proper divisors (48371895).

68446521 is a wasteful number, since it uses less digits than its factorization.

68446521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134 (or 4118 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 68446521 is about 8273.2412632535. The cubic root of 68446521 is about 409.0569660592.

It can be divided in two parts, 684465 and 21, that added together give a palindrome (684486).

The spelling of 68446521 in words is "sixty-eight million, four hundred forty-six thousand, five hundred twenty-one".