68681642 has 16 divisors (see below), whose sum is σ = 105840000. Its totient is φ = 33406560.

The previous prime is 68681629. The next prime is 68681651. The reversal of 68681642 is 24618686.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 68681642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33359 + ... + 35357.

It is an arithmetic number, because the mean of its divisors is an integer number (6615000).

Almost surely, 2^68681642 is an apocalyptic number.

68681642 is a deficient number, since it is larger than the sum of its proper divisors (37158358).

68681642 is a wasteful number, since it uses less digits than its factorization.

68681642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461.

The product of its digits is 110592, while the sum is 41.

The square root of 68681642 is about 8287.4388082205. The cubic root of 68681642 is about 409.5248153336.

It can be divided in two parts, 686 and 81642, that added together give a palindrome (82328).

The spelling of 68681642 in words is "sixty-eight million, six hundred eighty-one thousand, six hundred forty-two".