171487657866 has 32 divisors (see below), whose sum is σ = 392040972288. Its totient is φ = 48987825840.

The previous prime is 171487657849. The next prime is 171487657897. The reversal of 171487657866 is 668756784171.

It is a junction number, because it is equal to n+sod(n) for n = 171487657797 and 171487657806.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117610 + ... + 597333.

It is an arithmetic number, because the mean of its divisors is an integer number (12251280384).

Almost surely, 2^171487657866 is an apocalyptic number.

171487657866 is an abundant number, since it is smaller than the sum of its proper divisors (220553314422).

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

171487657866 is a wasteful number, since it uses less digits than its factorization.

171487657866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720666.

The product of its digits is 94832640, while the sum is 66.

The spelling of 171487657866 in words is "one hundred seventy-one billion, four hundred eighty-seven million, six hundred fifty-seven thousand, eight hundred sixty-six".