68635861 has 8 divisors (see below), whose sum is σ = 79136064. Its totient is φ = 58309440.

The previous prime is 68635849. The next prime is 68635867. The reversal of 68635861 is 16853686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68635861 - 2¹⁷ = 68504789 is a prime.

It is a super-2 number, since 2×68635861² = 9421762830422642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68635867) 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 7 ways as a sum of consecutive naturals, for example, 42595 + ... + 44176.

It is an arithmetic number, because the mean of its divisors is an integer number (9892008).

Almost surely, 2^68635861 is an apocalyptic number.

It is an amenable number.

68635861 is a deficient number, since it is larger than the sum of its proper divisors (10500203).

68635861 is a wasteful number, since it uses less digits than its factorization.

68635861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86891.

The product of its digits is 207360, while the sum is 43.

The square root of 68635861 is about 8284.6762761136. The cubic root of 68635861 is about 409.4338030326.

It can be divided in two parts, 68635 and 861, that added together give a palindrome (69496).

The spelling of 68635861 in words is "sixty-eight million, six hundred thirty-five thousand, eight hundred sixty-one".