68481283491 has 16 divisors (see below), whose sum is σ = 104726456320. Its totient is φ = 44181472680.

The previous prime is 68481283489. The next prime is 68481283499. The reversal of 68481283491 is 19438218486.

It is a happy number.

68481283491 is a `hidden beast` number, since 68 + 4 + 8 + 12 + 83 + 491 = 666.

It is not a de Polignac number, because 68481283491 - 2¹ = 68481283489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68481283499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40907935 + ... + 40909608.

It is an arithmetic number, because the mean of its divisors is an integer number (6545403520).

Almost surely, 2^68481283491 is an apocalyptic number.

68481283491 is a deficient number, since it is larger than the sum of its proper divisors (36245172829).

68481283491 is a wasteful number, since it uses less digits than its factorization.

68481283491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81817583 (or 81817577 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 68481283491 in words is "sixty-eight billion, four hundred eighty-one million, two hundred eighty-three thousand, four hundred ninety-one".