68981185140 has 96 divisors (see below), whose sum is σ = 220815888384. Its totient is φ = 15761692800.

The previous prime is 68981185087. The next prime is 68981185159. The reversal of 68981185140 is 4158118986.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1261365 + ... + 1314915.

It is an arithmetic number, because the mean of its divisors is an integer number (2300165504).

Almost surely, 2^68981185140 is an apocalyptic number.

68981185140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68981185140 is an abundant number, since it is smaller than the sum of its proper divisors (151834703244).

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

68981185140 is a wasteful number, since it uses less digits than its factorization.

68981185140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56637 (or 56635 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 51.

The spelling of 68981185140 in words is "sixty-eight billion, nine hundred eighty-one million, one hundred eighty-five thousand, one hundred forty".