671156227680 has 96 divisors (see below), whose sum is σ = 2114696644704. Its totient is φ = 178928050176.

The previous prime is 671156227603. The next prime is 671156227723. The reversal of 671156227680 is 86722651176.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 1667992 + ... + 2030888.

It is an arithmetic number, because the mean of its divisors is an integer number (22028090049).

Almost surely, 2^671156227680 is an apocalyptic number.

671156227680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671156227680 is an abundant number, since it is smaller than the sum of its proper divisors (1443540417024).

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

671156227680 is a wasteful number, since it uses less digits than its factorization.

671156227680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366768 (or 366760 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 671156227680 in words is "six hundred seventy-one billion, one hundred fifty-six million, two hundred twenty-seven thousand, six hundred eighty".