68994885491856 has 225 divisors, whose sum is σ = 200968952049481. Its totient is φ = 22852070777088.

The previous prime is 68994885491839. The next prime is 68994885491869. The reversal of 68994885491856 is 65819458849986.

The square root of 68994885491856 is 8306316.

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

68994885491856 is a `hidden beast` number, since 6 + 8 + 9 + 9 + 4 + 8 + 8 + 549 + 1 + 8 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55972602842256 + 13022282649600 = 7481484^2 + 3608640^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 53525899660 + ... + 53525900948.

Almost surely, 2^{68994885491856} is an apocalyptic number.

68994885491856 is the 8306316-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68994885491856

68994885491856 is an abundant number, since it is smaller than the sum of its proper divisors (131974066557625).

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

68994885491856 is an frugal number, since it uses more digits than its factorization.

68994885491856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956 (or 1473 counting only the distinct ones).

The product of its digits is 42998169600, while the sum is 90.

The spelling of 68994885491856 in words is "sixty-eight trillion, nine hundred ninety-four billion, eight hundred eighty-five million, four hundred ninety-one thousand, eight hundred fifty-six".