68645925 has 18 divisors (see below), whose sum is σ = 122952882. Its totient is φ = 36611040.

The previous prime is 68645909. The next prime is 68645977. The reversal of 68645925 is 52954686.

It can be written as a sum of positive squares in 3 ways, for example, as 1028196 + 67617729 = 1014^2 + 8223^2 .

It is not a de Polignac number, because 68645925 - 2⁴ = 68645909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 152322 + ... + 152771.

Almost surely, 2^68645925 is an apocalyptic number.

It is an amenable number.

68645925 is a deficient number, since it is larger than the sum of its proper divisors (54306957).

68645925 is a wasteful number, since it uses less digits than its factorization.

68645925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305109 (or 305101 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 68645925 is about 8285.2836402866. The cubic root of 68645925 is about 409.4538136624.

The spelling of 68645925 in words is "sixty-eight million, six hundred forty-five thousand, nine hundred twenty-five".