68712645 has 32 divisors (see below), whose sum is σ = 117936000. Its totient is φ = 34055424.

The previous prime is 68712641. The next prime is 68712653. The reversal of 68712645 is 54621786.

It is not a de Polignac number, because 68712645 - 2² = 68712641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68712641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12831 + ... + 17379.

It is an arithmetic number, because the mean of its divisors is an integer number (3685500).

Almost surely, 2^68712645 is an apocalyptic number.

It is an amenable number.

68712645 is a deficient number, since it is larger than the sum of its proper divisors (49223355).

68712645 is a wasteful number, since it uses less digits than its factorization.

68712645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629.

The product of its digits is 80640, while the sum is 39.

The square root of 68712645 is about 8289.3090785662. The cubic root of 68712645 is about 409.5864261103.

The spelling of 68712645 in words is "sixty-eight million, seven hundred twelve thousand, six hundred forty-five".