68991855326 has 16 divisors (see below), whose sum is σ = 107177923440. Its totient is φ = 33268583040.

The previous prime is 68991855323. The next prime is 68991855347. The reversal of 68991855326 is 62355819986.

It is a super-2 number, since 2×68991855326² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68991855323) 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, 623996 + ... + 726191.

It is an arithmetic number, because the mean of its divisors is an integer number (6698620215).

Almost surely, 2^68991855326 is an apocalyptic number.

68991855326 is a deficient number, since it is larger than the sum of its proper divisors (38186068114).

68991855326 is a wasteful number, since it uses less digits than its factorization.

68991855326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351099.

The product of its digits is 27993600, while the sum is 62.

The spelling of 68991855326 in words is "sixty-eight billion, nine hundred ninety-one million, eight hundred fifty-five thousand, three hundred twenty-six".