68181503870 has 16 divisors (see below), whose sum is σ = 122755398480. Its totient is φ = 27266225664.

The previous prime is 68181503837. The next prime is 68181503879. The reversal of 68181503870 is 7830518186.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68181503879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751952 + ... + 837731.

It is an arithmetic number, because the mean of its divisors is an integer number (7672212405).

Almost surely, 2^68181503870 is an apocalyptic number.

68181503870 is a deficient number, since it is larger than the sum of its proper divisors (54573894610).

68181503870 is a wasteful number, since it uses less digits than its factorization.

68181503870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593979.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 68181503870 in words is "sixty-eight billion, one hundred eighty-one million, five hundred three thousand, eight hundred seventy".