68645137003 has 4 divisors (see below), whose sum is σ = 68651021320. Its totient is φ = 68639252688.

The previous prime is 68645136971. The next prime is 68645137007. The reversal of 68645137003 is 30073154686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68645137003 - 2⁵ = 68645136971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68645137007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2924625 + ... + 2948002.

It is an arithmetic number, because the mean of its divisors is an integer number (17162755330).

Almost surely, 2^68645137003 is an apocalyptic number.

68645137003 is a deficient number, since it is larger than the sum of its proper divisors (5884317).

68645137003 is a wasteful number, since it uses less digits than its factorization.

68645137003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5884316.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 68645137003 in words is "sixty-eight billion, six hundred forty-five million, one hundred thirty-seven thousand, three".