68681625 has 16 divisors (see below), whose sum is σ = 114286848. Its totient is φ = 36630000.

The previous prime is 68681603. The next prime is 68681629. The reversal of 68681625 is 52618686.

It is not a de Polignac number, because 68681625 - 2⁷ = 68681497 is a prime.

It is a super-2 number, since 2×68681625² = 9434331225281250, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68681629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91201 + ... + 91950.

It is an arithmetic number, because the mean of its divisors is an integer number (7142928).

Almost surely, 2^68681625 is an apocalyptic number.

It is an amenable number.

68681625 is a deficient number, since it is larger than the sum of its proper divisors (45605223).

68681625 is a wasteful number, since it uses less digits than its factorization.

68681625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183169 (or 183159 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 68681625 is about 8287.4377825719. The cubic root of 68681625 is about 409.5247815452.

The spelling of 68681625 in words is "sixty-eight million, six hundred eighty-one thousand, six hundred twenty-five".