68509611 has 32 divisors (see below), whose sum is σ = 108192000. Its totient is φ = 42721344.

The previous prime is 68509603. The next prime is 68509627. The reversal of 68509611 is 11690586.

It is not a de Polignac number, because 68509611 - 2³ = 68509603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68509601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41775 + ... + 43383.

It is an arithmetic number, because the mean of its divisors is an integer number (3381000).

Almost surely, 2^68509611 is an apocalyptic number.

68509611 is a deficient number, since it is larger than the sum of its proper divisors (39682389).

68509611 is a wasteful number, since it uses less digits than its factorization.

68509611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720 (or 1714 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 68509611 is about 8277.0532800025. The cubic root of 68509611 is about 409.1826090596.

It can be divided in two parts, 6850 and 9611, that added together give a palindrome (16461).

The spelling of 68509611 in words is "sixty-eight million, five hundred nine thousand, six hundred eleven".