68604858668025 has 81 divisors (see below), whose sum is σ = 123511244960493. Its totient is φ = 36401934038400.

The previous prime is 68604858667987. The next prime is 68604858668039. The reversal of 68604858668025 is 52086685840686.

The square root of 68604858668025 is 8282805.

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

68604858668025 is a `hidden beast` number, since 6 + 8 + 6 + 0 + 485 + 8 + 66 + 80 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15022282987881 + 53582575680144 = 3875859^2 + 7320012^2 .

It is not a de Polignac number, because 68604858668025 - 2³⁵ = 68570498929657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 26215076517 + ... + 26215079133.

Almost surely, 2^{68604858668025} is an apocalyptic number.

68604858668025 is the 8282805-th square number.

68604858668025 is the 4141403-rd centered octagonal number.

It is an amenable number.

68604858668025 is a deficient number, since it is larger than the sum of its proper divisors (54906386292468).

68604858668025 is an frugal number, since it uses more digits than its factorization.

68604858668025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672 (or 2836 counting only the distinct ones).

The product of its (nonzero) digits is 1061683200, while the sum is 72.

The spelling of 68604858668025 in words is "sixty-eight trillion, six hundred four billion, eight hundred fifty-eight million, six hundred sixty-eight thousand, twenty-five".