68344137476550 has 144 divisors (see below), whose sum is σ = 197781375119328. Its totient is φ = 16819853990400.

The previous prime is 68344137476519. The next prime is 68344137476551. The reversal of 68344137476550 is 5567473144386.

68344137476550 is a `hidden beast` number, since 6 + 8 + 3 + 4 + 4 + 1 + 3 + 7 + 4 + 76 + 550 = 666.

It is a super-2 number, since 2×68344137476550² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68344137476551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 28574199 + ... + 30873501.

It is an arithmetic number, because the mean of its divisors is an integer number (1373481771662).

Almost surely, 2^{68344137476550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68344137476550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98890687559664).

68344137476550 is an abundant number, since it is smaller than the sum of its proper divisors (129437237642778).

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

68344137476550 is a wasteful number, since it uses less digits than its factorization.

68344137476550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304415 (or 2304407 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 63.

The spelling of 68344137476550 in words is "sixty-eight trillion, three hundred forty-four billion, one hundred thirty-seven million, four hundred seventy-six thousand, five hundred fifty".