68564868 has 12 divisors (see below), whose sum is σ = 159984720. Its totient is φ = 22854952.

The previous prime is 68564861. The next prime is 68564879. The reversal of 68564868 is 86846586.

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

It is a super-2 number, since 2×68564868² = 9402282247714848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68564868.

It is not an unprimeable number, because it can be changed into a prime (68564861) 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, 2856858 + ... + 2856881.

It is an arithmetic number, because the mean of its divisors is an integer number (13332060).

Almost surely, 2^68564868 is an apocalyptic number.

It is an amenable number.

68564868 is an abundant number, since it is smaller than the sum of its proper divisors (91419852).

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

68564868 is a wasteful number, since it uses less digits than its factorization.

68564868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713746 (or 5713744 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 51.

The square root of 68564868 is about 8280.3905704985. The cubic root of 68564868 is about 409.2925893821.

The spelling of 68564868 in words is "sixty-eight million, five hundred sixty-four thousand, eight hundred sixty-eight".