68504061823 has 4 divisors (see below), whose sum is σ = 68690721760. Its totient is φ = 68317401888.

The previous prime is 68504061809. The next prime is 68504061851. The reversal of 68504061823 is 32816040586.

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 68504061823 - 2¹⁷ = 68503930751 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68504061823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68504061853) 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, 93329418 + ... + 93330151.

It is an arithmetic number, because the mean of its divisors is an integer number (17172680440).

Almost surely, 2^68504061823 is an apocalyptic number.

68504061823 is a deficient number, since it is larger than the sum of its proper divisors (186659937).

68504061823 is a wasteful number, since it uses less digits than its factorization.

68504061823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186659936.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 68504061823 in words is "sixty-eight billion, five hundred four million, sixty-one thousand, eight hundred twenty-three".