68159713508 has 12 divisors (see below), whose sum is σ = 119774436012. Its totient is φ = 33938446080.

The previous prime is 68159713493. The next prime is 68159713513. The reversal of 68159713508 is 80531795186.

It can be written as a sum of positive squares in 2 ways, for example, as 24297950884 + 43861762624 = 155878^2 + 209432^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68159713508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35351585 + ... + 35353512.

It is an arithmetic number, because the mean of its divisors is an integer number (9981203001).

Almost surely, 2^68159713508 is an apocalyptic number.

It is an amenable number.

68159713508 is a deficient number, since it is larger than the sum of its proper divisors (51614722504).

68159713508 is a wasteful number, since it uses less digits than its factorization.

68159713508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70705342 (or 70705340 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 68159713508 in words is "sixty-eight billion, one hundred fifty-nine million, seven hundred thirteen thousand, five hundred eight".