68621964 has 12 divisors (see below), whose sum is σ = 160117944. Its totient is φ = 22873984.

The previous prime is 68621963. The next prime is 68622049. The reversal of 68621964 is 46912686.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (68621963) 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 3 ways as a sum of consecutive naturals, for example, 2859237 + ... + 2859260.

It is an arithmetic number, because the mean of its divisors is an integer number (13343162).

Almost surely, 2^68621964 is an apocalyptic number.

It is an amenable number.

68621964 is an abundant number, since it is smaller than the sum of its proper divisors (91495980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68621964 is a wasteful number, since it uses less digits than its factorization.

68621964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5718504 (or 5718502 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 68621964 is about 8283.8375165137. The cubic root of 68621964 is about 409.4061678890.

The spelling of 68621964 in words is "sixty-eight million, six hundred twenty-one thousand, nine hundred sixty-four".