671081057178 has 32 divisors (see below), whose sum is σ = 1583380193280. Its totient is φ = 185552365680.

The previous prime is 671081057137. The next prime is 671081057191. The reversal of 671081057178 is 871750180176.

It is a self number, because there is not a number n which added to its sum of digits gives 671081057178.

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, 257710318 + ... + 257712921.

It is an arithmetic number, because the mean of its divisors is an integer number (49480631040).

Almost surely, 2^671081057178 is an apocalyptic number.

671081057178 is an abundant number, since it is smaller than the sum of its proper divisors (912299136102).

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

671081057178 is a wasteful number, since it uses less digits than its factorization.

671081057178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515423282.

The product of its (nonzero) digits is 658560, while the sum is 51.

The spelling of 671081057178 in words is "six hundred seventy-one billion, eighty-one million, fifty-seven thousand, one hundred seventy-eight".