71628537388166 has 16 divisors (see below), whose sum is σ = 117929415716928. Its totient is φ = 32358681138600.

The previous prime is 71628537388139. The next prime is 71628537388171. The reversal of 71628537388166 is 66188373582617.

It is a self number, because there is not a number n which added to its sum of digits gives 71628537388166.

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, 9987243680 + ... + 9987250851.

It is an arithmetic number, because the mean of its divisors is an integer number (7370588482308).

Almost surely, 2^{71628537388166} is an apocalyptic number.

71628537388166 is a deficient number, since it is larger than the sum of its proper divisors (46300878328762).

71628537388166 is a wasteful number, since it uses less digits than its factorization.

71628537388166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19974494707.

The product of its digits is 487710720, while the sum is 71.

The spelling of 71628537388166 in words is "seventy-one trillion, six hundred twenty-eight billion, five hundred thirty-seven million, three hundred eighty-eight thousand, one hundred sixty-six".