68504531751281 has 16 divisors (see below), whose sum is σ = 68980167320064. Its totient is φ = 68030443793664.

The previous prime is 68504531751251. The next prime is 68504531751319. The reversal of 68504531751281 is 18215713540586.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68504531751281 is a prime.

It is a super-2 number, since 2×68504531751281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68504531751251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760550210 + ... + 760640276.

It is an arithmetic number, because the mean of its divisors is an integer number (4311260457504).

Almost surely, 2^{68504531751281} is an apocalyptic number.

It is an amenable number.

68504531751281 is a deficient number, since it is larger than the sum of its proper divisors (475635568783).

68504531751281 is a wasteful number, since it uses less digits than its factorization.

68504531751281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98600.

The product of its (nonzero) digits is 8064000, while the sum is 56.

The spelling of 68504531751281 in words is "sixty-eight trillion, five hundred four billion, five hundred thirty-one million, seven hundred fifty-one thousand, two hundred eighty-one".