68021330225 has 24 divisors (see below), whose sum is σ = 86184718200. Its totient is φ = 53236984320.

The previous prime is 68021330207. The next prime is 68021330281. The reversal of 68021330225 is 52203312086.

68021330225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 29203216 + 67992127009 = 5404^2 + 260753^2 .

It is not a de Polignac number, because 68021330225 - 2⁸ = 68021329969 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68021330191 and 68021330200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388877 + ... + 535973.

It is an arithmetic number, because the mean of its divisors is an integer number (3591029925).

Almost surely, 2^68021330225 is an apocalyptic number.

It is an amenable number.

68021330225 is a deficient number, since it is larger than the sum of its proper divisors (18163387975).

68021330225 is a wasteful number, since it uses less digits than its factorization.

68021330225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147509 (or 147504 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 68021330225 in words is "sixty-eight billion, twenty-one million, three hundred thirty thousand, two hundred twenty-five".