68138173847 has 8 divisors (see below), whose sum is σ = 68300694672. Its totient is φ = 67975848000.

The previous prime is 68138173837. The next prime is 68138173861. The reversal of 68138173847 is 74837183186.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68138173847 - 2⁶ = 68138173783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68138173792 and 68138173801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68138173837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663347 + ... + 759147.

It is an arithmetic number, because the mean of its divisors is an integer number (8537586834).

Almost surely, 2^68138173847 is an apocalyptic number.

68138173847 is a deficient number, since it is larger than the sum of its proper divisors (162520825).

68138173847 is an equidigital number, since it uses as much as digits as its factorization.

68138173847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97489.

The product of its digits is 5419008, while the sum is 56.

The spelling of 68138173847 in words is "sixty-eight billion, one hundred thirty-eight million, one hundred seventy-three thousand, eight hundred forty-seven".