72063421686 has 64 divisors (see below), whose sum is σ = 167774300160. Its totient is φ = 22899270240.

The previous prime is 72063421679. The next prime is 72063421691. The reversal of 72063421686 is 68612436027.

72063421686 is a `hidden beast` number, since 7 + 2 + 0 + 634 + 2 + 1 + 6 + 8 + 6 = 666.

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, 209101 + ... + 433416.

It is an arithmetic number, because the mean of its divisors is an integer number (2621473440).

Almost surely, 2^72063421686 is an apocalyptic number.

72063421686 is an abundant number, since it is smaller than the sum of its proper divisors (95710878474).

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

72063421686 is a wasteful number, since it uses less digits than its factorization.

72063421686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642626 (or 642620 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 72063421686 in words is "seventy-two billion, sixty-three million, four hundred twenty-one thousand, six hundred eighty-six".