68636565 has 48 divisors (see below), whose sum is σ = 130673088. Its totient is φ = 34442496.

The previous prime is 68636563. The next prime is 68636587. The reversal of 68636565 is 56563686.

68636565 is a `hidden beast` number, since 6 + 8 + 636 + 5 + 6 + 5 = 666.

It is not a de Polignac number, because 68636565 - 2¹ = 68636563 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 68636565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68636563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18994 + ... + 22316.

It is an arithmetic number, because the mean of its divisors is an integer number (2722356).

Almost surely, 2^68636565 is an apocalyptic number.

It is an amenable number.

68636565 is a deficient number, since it is larger than the sum of its proper divisors (62036523).

68636565 is a wasteful number, since it uses less digits than its factorization.

68636565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360 (or 3348 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 68636565 is about 8284.7187640861. The cubic root of 68636565 is about 409.4352028859.

The spelling of 68636565 in words is "sixty-eight million, six hundred thirty-six thousand, five hundred sixty-five".