68561611 has 4 divisors (see below), whose sum is σ = 69055000. Its totient is φ = 68068224.

The previous prime is 68561609. The next prime is 68561627. The reversal of 68561611 is 11616586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11616586 = 2 ⋅5808293.

It is a cyclic number.

It is not a de Polignac number, because 68561611 - 2¹ = 68561609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68561411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246486 + ... + 246763.

It is an arithmetic number, because the mean of its divisors is an integer number (17263750).

Almost surely, 2^68561611 is an apocalyptic number.

68561611 is a deficient number, since it is larger than the sum of its proper divisors (493389).

68561611 is a wasteful number, since it uses less digits than its factorization.

68561611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493388.

The product of its digits is 8640, while the sum is 34.

The square root of 68561611 is about 8280.1938986959. The cubic root of 68561611 is about 409.2861084776.

The spelling of 68561611 in words is "sixty-eight million, five hundred sixty-one thousand, six hundred eleven".