68516085438 has 20 divisors (see below), whose sum is σ = 153526784400. Its totient is φ = 22838695092.

The previous prime is 68516085419. The next prime is 68516085461. The reversal of 68516085438 is 83458061586.

68516085438 is a `hidden beast` number, since 6 + 8 + 516 + 0 + 85 + 43 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 211469238 + ... + 211469561.

It is an arithmetic number, because the mean of its divisors is an integer number (7676339220).

Almost surely, 2^68516085438 is an apocalyptic number.

68516085438 is an abundant number, since it is smaller than the sum of its proper divisors (85010698962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68516085438 is a wasteful number, since it uses less digits than its factorization.

68516085438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422938813 (or 422938804 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 68516085438 in words is "sixty-eight billion, five hundred sixteen million, eighty-five thousand, four hundred thirty-eight".