68857384861225 has 27 divisors (see below), whose sum is σ = 85837831536933. Its totient is φ = 54794115786240.

The previous prime is 68857384861211. The next prime is 68857384861241. The reversal of 68857384861225 is 52216848375886.

The square root of 68857384861225 is 8298035.

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

It can be written as a sum of positive squares in 4 ways, for example, as 11074339362969 + 57783045498256 = 3327813^2 + 7601516^2 .

It is not a de Polignac number, because 68857384861225 - 2²¹ = 68857382764073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8007599476 + ... + 8007608074.

Almost surely, 2^{68857384861225} is an apocalyptic number.

68857384861225 is the 8298035-th square number.

68857384861225 is the 4149018-th centered octagonal number.

It is an amenable number.

68857384861225 is a deficient number, since it is larger than the sum of its proper divisors (16980446675708).

68857384861225 is an frugal number, since it uses more digits than its factorization.

68857384861225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17594 (or 8797 counting only the distinct ones).

The product of its digits is 1238630400, while the sum is 73.

The spelling of 68857384861225 in words is "sixty-eight trillion, eight hundred fifty-seven billion, three hundred eighty-four million, eight hundred sixty-one thousand, two hundred twenty-five".