2173146456 has 64 divisors (see below), whose sum is σ = 6008940000. Its totient is φ = 650585088.

The previous prime is 2173146389. The next prime is 2173146491. The reversal of 2173146456 is 6546413712.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82581 + ... + 105668.

Almost surely, 2^2173146456 is an apocalyptic number.

2173146456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2173146456 is an abundant number, since it is smaller than the sum of its proper divisors (3835793544).

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

2173146456 is a wasteful number, since it uses less digits than its factorization.

2173146456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188308 (or 188304 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 2173146456 is about 46617.0189523097. The cubic root of 2173146456 is about 1295.2780281887.

The spelling of 2173146456 in words is "two billion, one hundred seventy-three million, one hundred forty-six thousand, four hundred fifty-six".