68635616256 has 99 divisors (see below), whose sum is σ = 198256500481. Its totient is φ = 22870155264.

The previous prime is 68635616237. The next prime is 68635616279. The reversal of 68635616256 is 65261653686.

The square root of 68635616256 is 261984.

It is a perfect power (a square), and thus also a powerful number.

68635616256 is a `hidden beast` number, since 6 + 8 + 6 + 3 + 5 + 6 + 1 + 625 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 66143609856 + 2492006400 = 257184^2 + 49920^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25149100 + ... + 25151828.

Almost surely, 2^68635616256 is an apocalyptic number.

68635616256 is the 261984-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68635616256

68635616256 is an abundant number, since it is smaller than the sum of its proper divisors (129620884225).

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

68635616256 is an frugal number, since it uses more digits than its factorization.

68635616256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484 (or 2734 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 54.

The spelling of 68635616256 in words is "sixty-eight billion, six hundred thirty-five million, six hundred sixteen thousand, two hundred fifty-six".