68455281 has 16 divisors (see below), whose sum is σ = 95094720. Its totient is φ = 43764480.

The previous prime is 68455279. The next prime is 68455301. The reversal of 68455281 is 18255486.

It is not a de Polignac number, because 68455281 - 2¹ = 68455279 is a prime.

It is a super-2 number, since 2×68455281² = 9372250993577922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68455181) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2541 + ... + 11973.

It is an arithmetic number, because the mean of its divisors is an integer number (5943420).

Almost surely, 2^68455281 is an apocalyptic number.

It is an amenable number.

68455281 is a deficient number, since it is larger than the sum of its proper divisors (26639439).

68455281 is a wasteful number, since it uses less digits than its factorization.

68455281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9536.

The product of its digits is 76800, while the sum is 39.

The square root of 68455281 is about 8273.7706639718. The cubic root of 68455281 is about 409.0744161117.

The spelling of 68455281 in words is "sixty-eight million, four hundred fifty-five thousand, two hundred eighty-one".