2173447680 has 80 divisors (see below), whose sum is σ = 6948265104. Its totient is φ = 579584000.

The previous prime is 2173447667. The next prime is 2173447687. The reversal of 2173447680 is 867443712.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173447687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133821 + ... + 149180.

Almost surely, 2^2173447680 is an apocalyptic number.

2173447680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2173447680 is an abundant number, since it is smaller than the sum of its proper divisors (4774817424).

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

2173447680 is an equidigital number, since it uses as much as digits as its factorization.

2173447680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283027 (or 283011 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 2173447680 is about 46620.2496775811. The cubic root of 2173447680 is about 1295.3378724146.

The spelling of 2173447680 in words is "two billion, one hundred seventy-three million, four hundred forty-seven thousand, six hundred eighty".