68453505 has 40 divisors (see below), whose sum is σ = 123544872. Its totient is φ = 36260352.

The previous prime is 68453471. The next prime is 68453513. The reversal of 68453505 is 50535486.

It can be written as a sum of positive squares in 4 ways, for example, as 37015056 + 31438449 = 6084^2 + 5607^2 .

It is not a de Polignac number, because 68453505 - 2⁸ = 68453249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68453505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 69577 + ... + 70553.

Almost surely, 2^68453505 is an apocalyptic number.

It is an amenable number.

68453505 is a deficient number, since it is larger than the sum of its proper divisors (55091367).

68453505 is a wasteful number, since it uses less digits than its factorization.

68453505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 68453505 is about 8273.6633361529. The cubic root of 68453505 is about 409.0708784132.

The spelling of 68453505 in words is "sixty-eight million, four hundred fifty-three thousand, five hundred five".