68145513 has 8 divisors (see below), whose sum is σ = 90928800. Its totient is φ = 45396288.

The previous prime is 68145487. The next prime is 68145541. The reversal of 68145513 is 31554186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68145513 - 2²¹ = 66048361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68145593) 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 7 ways as a sum of consecutive naturals, for example, 3408 + ... + 12161.

It is an arithmetic number, because the mean of its divisors is an integer number (11366100).

Almost surely, 2^68145513 is an apocalyptic number.

It is an amenable number.

68145513 is a deficient number, since it is larger than the sum of its proper divisors (22783287).

68145513 is a wasteful number, since it uses less digits than its factorization.

68145513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17031.

The product of its digits is 14400, while the sum is 33.

The square root of 68145513 is about 8255.0295577908. The cubic root of 68145513 is about 408.4564468238.

Adding to 68145513 its reverse (31554186), we get a palindrome (99699699).

The spelling of 68145513 in words is "sixty-eight million, one hundred forty-five thousand, five hundred thirteen".