136668454 has 16 divisors (see below), whose sum is σ = 226740528. Its totient is φ = 61372512.

The previous prime is 136668437. The next prime is 136668473. The reversal of 136668454 is 454866631.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 136668454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70072 + ... + 71995.

It is an arithmetic number, because the mean of its divisors is an integer number (14171283).

Almost surely, 2^136668454 is an apocalyptic number.

136668454 is a deficient number, since it is larger than the sum of its proper divisors (90072074).

136668454 is a wasteful number, since it uses less digits than its factorization.

136668454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142119.

The product of its digits is 414720, while the sum is 43.

The square root of 136668454 is about 11690.5283884006. The cubic root of 136668454 is about 515.0974824108.

The spelling of 136668454 in words is "one hundred thirty-six million, six hundred sixty-eight thousand, four hundred fifty-four".