71671163904 has 110 divisors (see below), whose sum is σ = 214024355204. Its totient is φ = 23890360320.

The previous prime is 71671163887. The next prime is 71671163951. The reversal of 71671163904 is 40936117617.

71671163904 is a `hidden beast` number, since 7 + 1 + 6 + 7 + 1 + 1 + 639 + 0 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 71671163904.

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 9 ways as a sum of consecutive naturals, for example, 349102 + ... + 514989.

Almost surely, 2^71671163904 is an apocalyptic number.

It is an amenable number.

71671163904 is an abundant number, since it is smaller than the sum of its proper divisors (142353191300).

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

71671163904 is an equidigital number, since it uses as much as digits as its factorization.

71671163904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864123 (or 864096 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 71671163904 in words is "seventy-one billion, six hundred seventy-one million, one hundred sixty-three thousand, nine hundred four".