68533645025 has 6 divisors (see below), whose sum is σ = 84981719862. Its totient is φ = 54826916000.

The previous prime is 68533645007. The next prime is 68533645051. The reversal of 68533645025 is 52054633586.

It can be written as a sum of positive squares in 3 ways, for example, as 18359437009 + 50174208016 = 135497^2 + 223996^2 .

It is not a de Polignac number, because 68533645025 - 2⁶ = 68533644961 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 (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1370672876 + ... + 1370672925.

It is an arithmetic number, because the mean of its divisors is an integer number (14163619977).

Almost surely, 2^68533645025 is an apocalyptic number.

It is an amenable number.

68533645025 is a deficient number, since it is larger than the sum of its proper divisors (16448074837).

68533645025 is a wasteful number, since it uses less digits than its factorization.

68533645025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741345811 (or 2741345806 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 68533645025 in words is "sixty-eight billion, five hundred thirty-three million, six hundred forty-five thousand, twenty-five".