68138173848 has 64 divisors (see below), whose sum is σ = 175898603520. Its totient is φ = 21972787200.

The previous prime is 68138173837. The next prime is 68138173861. The reversal of 68138173848 is 84837183186.

It is a super-2 number, since 2×68138173848² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2521368 + ... + 2548248.

It is an arithmetic number, because the mean of its divisors is an integer number (2748415680).

Almost surely, 2^68138173848 is an apocalyptic number.

It is an amenable number.

68138173848 is an abundant number, since it is smaller than the sum of its proper divisors (107760429672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68138173848 is a wasteful number, since it uses less digits than its factorization.

68138173848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30328 (or 30324 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 57.

The spelling of 68138173848 in words is "sixty-eight billion, one hundred thirty-eight million, one hundred seventy-three thousand, eight hundred forty-eight".