68145961280 has 28 divisors (see below), whose sum is σ = 162272571060. Its totient is φ = 27258384384.

The previous prime is 68145961237. The next prime is 68145961283. The reversal of 68145961280 is 8216954186.

It can be written as a sum of positive squares in 2 ways, for example, as 21465766144 + 46680195136 = 146512^2 + 216056^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68145961283) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 106477745 + ... + 106478384.

Almost surely, 2^68145961280 is an apocalyptic number.

It is an amenable number.

68145961280 is an abundant number, since it is smaller than the sum of its proper divisors (94126609780).

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

68145961280 is a wasteful number, since it uses less digits than its factorization.

68145961280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212956146 (or 212956136 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 68145961280 in words is "sixty-eight billion, one hundred forty-five million, nine hundred sixty-one thousand, two hundred eighty".