68149550140 has 48 divisors (see below), whose sum is σ = 166240234944. Its totient is φ = 22982515200.

The previous prime is 68149550101. The next prime is 68149550159. The reversal of 68149550140 is 4105594186.

It is a super-3 number, since 3×68149550140³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3981481 + ... + 3998560.

It is an arithmetic number, because the mean of its divisors is an integer number (3463338228).

Almost surely, 2^68149550140 is an apocalyptic number.

It is an amenable number.

68149550140 is an abundant number, since it is smaller than the sum of its proper divisors (98090684804).

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

68149550140 is a wasteful number, since it uses less digits than its factorization.

68149550140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7980118 (or 7980116 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 68149550140 in words is "sixty-eight billion, one hundred forty-nine million, five hundred fifty thousand, one hundred forty".