68645321373 has 4 divisors (see below), whose sum is σ = 91527095168. Its totient is φ = 45763547580.

The previous prime is 68645321351. The next prime is 68645321413. The reversal of 68645321373 is 37312354686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68645321373 - 2¹⁶ = 68645255837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68645321333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11440886893 + ... + 11440886898.

It is an arithmetic number, because the mean of its divisors is an integer number (22881773792).

Almost surely, 2^68645321373 is an apocalyptic number.

It is an amenable number.

68645321373 is a deficient number, since it is larger than the sum of its proper divisors (22881773795).

68645321373 is a wasteful number, since it uses less digits than its factorization.

68645321373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22881773794.

The product of its digits is 2177280, while the sum is 48.

The spelling of 68645321373 in words is "sixty-eight billion, six hundred forty-five million, three hundred twenty-one thousand, three hundred seventy-three".