68431455 has 24 divisors (see below), whose sum is σ = 120390192. Its totient is φ = 35950464.

The previous prime is 68431421. The next prime is 68431469. The reversal of 68431455 is 55413486.

It is a happy number.

It is not a de Polignac number, because 68431455 - 2¹⁰ = 68430431 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 8334 + ... + 14363.

It is an arithmetic number, because the mean of its divisors is an integer number (5016258).

Almost surely, 2^68431455 is an apocalyptic number.

68431455 is a deficient number, since it is larger than the sum of its proper divisors (51958737).

68431455 is a wasteful number, since it uses less digits than its factorization.

68431455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22775 (or 22772 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 68431455 is about 8272.3306872973. The cubic root of 68431455 is about 409.0269508766.

It can be divided in two parts, 6843145 and 5, that added together give a triangular number (6843150 = T₃₆₉₉).

The spelling of 68431455 in words is "sixty-eight million, four hundred thirty-one thousand, four hundred fifty-five".