68435505 has 36 divisors (see below), whose sum is σ = 123250140. Its totient is φ = 35086464.

The previous prime is 68435467. The next prime is 68435527. The reversal of 68435505 is 50553486.

68435505 is a `hidden beast` number, since 68 + 43 + 550 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 13571856 + 54863649 = 3684^2 + 7407^2 .

It is not a de Polignac number, because 68435505 - 2⁶ = 68435441 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68435505.

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 35 ways as a sum of consecutive naturals, for example, 298731 + ... + 298959.

It is an arithmetic number, because the mean of its divisors is an integer number (3423615).

Almost surely, 2^68435505 is an apocalyptic number.

It is an amenable number.

68435505 is a deficient number, since it is larger than the sum of its proper divisors (54814635).

68435505 is a wasteful number, since it uses less digits than its factorization.

68435505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 266 counting only the distinct ones).

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

The square root of 68435505 is about 8272.5754756303. The cubic root of 68435505 is about 409.0350199070.

The spelling of 68435505 in words is "sixty-eight million, four hundred thirty-five thousand, five hundred five".