68644516 has 24 divisors (see below), whose sum is σ = 121963520. Its totient is φ = 33802272.

The previous prime is 68644507. The next prime is 68644517. The reversal of 68644516 is 61544686.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68644517) 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, 82390 + ... + 83218.

Almost surely, 2^68644516 is an apocalyptic number.

It is an amenable number.

68644516 is a deficient number, since it is larger than the sum of its proper divisors (53319004).

68644516 is a wasteful number, since it uses less digits than its factorization.

68644516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123 (or 1121 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 68644516 is about 8285.1986095688. The cubic root of 68644516 is about 409.4510122124.

The spelling of 68644516 in words is "sixty-eight million, six hundred forty-four thousand, five hundred sixteen".