68715455 has 4 divisors (see below), whose sum is σ = 82458552. Its totient is φ = 54972360.

The previous prime is 68715403. The next prime is 68715469. The reversal of 68715455 is 55451786.

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

It is not a de Polignac number, because 68715455 - 2⁶ = 68715391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6871541 + ... + 6871550.

It is an arithmetic number, because the mean of its divisors is an integer number (20614638).

Almost surely, 2^68715455 is an apocalyptic number.

68715455 is a deficient number, since it is larger than the sum of its proper divisors (13743097).

68715455 is a wasteful number, since it uses less digits than its factorization.

68715455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13743096.

The product of its digits is 168000, while the sum is 41.

The square root of 68715455 is about 8289.4785722626. The cubic root of 68715455 is about 409.5920093726.

The spelling of 68715455 in words is "sixty-eight million, seven hundred fifteen thousand, four hundred fifty-five".