68358815481 has 32 divisors (see below), whose sum is σ = 105424149888. Its totient is φ = 38939120640.

The previous prime is 68358815479. The next prime is 68358815527. The reversal of 68358815481 is 18451885386.

It is not a de Polignac number, because 68358815481 - 2¹ = 68358815479 is a prime.

It is a super-2 number, since 2×68358815481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68358895481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328095 + ... + 494331.

It is an arithmetic number, because the mean of its divisors is an integer number (3294504684).

Almost surely, 2^68358815481 is an apocalyptic number.

It is an amenable number.

68358815481 is a deficient number, since it is larger than the sum of its proper divisors (37065334407).

68358815481 is a wasteful number, since it uses less digits than its factorization.

68358815481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167001.

The product of its digits is 7372800, while the sum is 57.

The spelling of 68358815481 in words is "sixty-eight billion, three hundred fifty-eight million, eight hundred fifteen thousand, four hundred eighty-one".