68754821481 has 12 divisors (see below), whose sum is σ = 100940594820. Its totient is φ = 45085128480.

The previous prime is 68754821479. The next prime is 68754821489. The reversal of 68754821481 is 18412845786.

68754821481 is a `hidden beast` number, since 6 + 8 + 7 + 548 + 2 + 14 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31605728400 + 37149093081 = 177780^2 + 192741^2 .

It is not a de Polignac number, because 68754821481 - 2¹ = 68754821479 is a prime.

It is a super-2 number, since 2×68754821481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68754821489) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 62617686 + ... + 62618783.

It is an arithmetic number, because the mean of its divisors is an integer number (8411716235).

Almost surely, 2^68754821481 is an apocalyptic number.

68754821481 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

68754821481 is a deficient number, since it is larger than the sum of its proper divisors (32185773339).

68754821481 is a wasteful number, since it uses less digits than its factorization.

68754821481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125236536 (or 125236533 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 54.

The spelling of 68754821481 in words is "sixty-eight billion, seven hundred fifty-four million, eight hundred twenty-one thousand, four hundred eighty-one".