68128516 has 9 divisors (see below), whose sum is σ = 119253799. Its totient is φ = 34056004.

The previous prime is 68128513. The next prime is 68128517. The reversal of 68128516 is 61582186.

The square root of 68128516 is 8254.

It is a perfect power (a square), and thus also a powerful number.

68128516 is nontrivially palindromic in base 16.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68128513) 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 2 ways as a sum of consecutive naturals, for example, 14445 + ... + 18571.

Almost surely, 2^68128516 is an apocalyptic number.

68128516 is the 8254-th square number.

It is an amenable number.

68128516 is a deficient number, since it is larger than the sum of its proper divisors (51125283).

68128516 is an frugal number, since it uses more digits than its factorization.

68128516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8258 (or 4129 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The cubic root of 68128516 is about 408.4224846390.

It can be divided in two parts, 68128 and 516, that added together give a square (68644 = 262²).

The spelling of 68128516 in words is "sixty-eight million, one hundred twenty-eight thousand, five hundred sixteen".