72471819566 has 16 divisors (see below), whose sum is σ = 111060673344. Its totient is φ = 35455321824.

The previous prime is 72471819557. The next prime is 72471819593. The reversal of 72471819566 is 66591817427.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 892565 + ... + 970368.

It is an arithmetic number, because the mean of its divisors is an integer number (6941292084).

Almost surely, 2^72471819566 is an apocalyptic number.

72471819566 is a deficient number, since it is larger than the sum of its proper divisors (38588853778).

72471819566 is a wasteful number, since it uses less digits than its factorization.

72471819566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863355.

The product of its digits is 5080320, while the sum is 56.

The spelling of 72471819566 in words is "seventy-two billion, four hundred seventy-one million, eight hundred nineteen thousand, five hundred sixty-six".