68505569 has 16 divisors (see below), whose sum is σ = 80680320. Its totient is φ = 57509760.

The previous prime is 68505539. The next prime is 68505589. The reversal of 68505569 is 96550586.

It is not a de Polignac number, because 68505569 - 2¹² = 68501473 is a prime.

It is a super-2 number, since 2×68505569² = 9386025968027522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68505509) 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 15 ways as a sum of consecutive naturals, for example, 2669 + ... + 12005.

It is an arithmetic number, because the mean of its divisors is an integer number (5042520).

Almost surely, 2^68505569 is an apocalyptic number.

It is an amenable number.

68505569 is a deficient number, since it is larger than the sum of its proper divisors (12174751).

68505569 is a wasteful number, since it uses less digits than its factorization.

68505569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9400.

The product of its (nonzero) digits is 324000, while the sum is 44.

The square root of 68505569 is about 8276.8091073795. The cubic root of 68505569 is about 409.1745617768.

The spelling of 68505569 in words is "sixty-eight million, five hundred five thousand, five hundred sixty-nine".