68453054545 has 4 divisors (see below), whose sum is σ = 82143665460. Its totient is φ = 54762443632.

The previous prime is 68453054513. The next prime is 68453054557. The reversal of 68453054545 is 54545035486.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45397972624 + 23055081921 = 213068^2 + 151839^2 .

It is a cyclic number.

It is not a de Polignac number, because 68453054545 - 2⁵ = 68453054513 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6845305450 + ... + 6845305459.

It is an arithmetic number, because the mean of its divisors is an integer number (20535916365).

Almost surely, 2^68453054545 is an apocalyptic number.

It is an amenable number.

68453054545 is a deficient number, since it is larger than the sum of its proper divisors (13690610915).

68453054545 is a wasteful number, since it uses less digits than its factorization.

68453054545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13690610914.

The product of its (nonzero) digits is 5760000, while the sum is 49.

The spelling of 68453054545 in words is "sixty-eight billion, four hundred fifty-three million, fifty-four thousand, five hundred forty-five".