68815025 has 6 divisors (see below), whose sum is σ = 85330662. Its totient is φ = 55052000.

The previous prime is 68815013. The next prime is 68815027. The reversal of 68815025 is 52051886.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 15335056 + 53479969 = 3916^2 + 7313^2 .

It is not a de Polignac number, because 68815025 - 2¹⁸ = 68552881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68815027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1376276 + ... + 1376325.

It is an arithmetic number, because the mean of its divisors is an integer number (14221777).

Almost surely, 2^68815025 is an apocalyptic number.

It is an amenable number.

68815025 is a deficient number, since it is larger than the sum of its proper divisors (16515637).

68815025 is a wasteful number, since it uses less digits than its factorization.

68815025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752611 (or 2752606 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 68815025 is about 8295.4822041880. The cubic root of 68815025 is about 409.7897494285.

The spelling of 68815025 in words is "sixty-eight million, eight hundred fifteen thousand, twenty-five".