68698320518025 has 243 divisors, whose sum is σ = 136480013205991. Its totient is φ = 33007903368000.

The previous prime is 68698320517999. The next prime is 68698320518039. The reversal of 68698320518025 is 52081502389686.

The square root of 68698320518025 is 8288445.

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

68698320518025 is a `hidden beast` number, since 6 + 8 + 6 + 98 + 3 + 2 + 0 + 518 + 0 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24731395386489 + 43966925131536 = 4973067^2 + 6630756^2 .

It is a de Polignac number, because none of the positive numbers 2^k-68698320518025 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 242 ways as a sum of consecutive naturals, for example, 261210344044 + ... + 261210344306.

Almost surely, 2^{68698320518025} is an apocalyptic number.

68698320518025 is the 8288445-th square number.

68698320518025 is the 4144223-rd centered octagonal number.

It is an amenable number.

68698320518025 is a deficient number, since it is larger than the sum of its proper divisors (67781692687966).

68698320518025 is a wasteful number, since it uses less digits than its factorization.

68698320518025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 63.

The spelling of 68698320518025 in words is "sixty-eight trillion, six hundred ninety-eight billion, three hundred twenty million, five hundred eighteen thousand, twenty-five".