68455568 has 40 divisors (see below), whose sum is σ = 136746456. Its totient is φ = 33177600.

The previous prime is 68455561. The next prime is 68455577. The reversal of 68455568 is 86555486.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29584 + 68425984 = 172^2 + 8272^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68455561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157880 + ... + 158312.

Almost surely, 2^68455568 is an apocalyptic number.

It is an amenable number.

68455568 is a deficient number, since it is larger than the sum of its proper divisors (68290888).

68455568 is a wasteful number, since it uses less digits than its factorization.

68455568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 717 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 47.

The square root of 68455568 is about 8273.7880079200. The cubic root of 68455568 is about 409.0749877949.

The spelling of 68455568 in words is "sixty-eight million, four hundred fifty-five thousand, five hundred sixty-eight".