2172323777876 has 144 divisors (see below), whose sum is σ = 4535167553280. Its totient is φ = 907471918080.

The previous prime is 2172323777867. The next prime is 2172323777927. The reversal of 2172323777876 is 6787773232712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1159808876 + ... + 1159810748.

It is an arithmetic number, because the mean of its divisors is an integer number (31494219120).

Almost surely, 2^{2172323777876} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2172323777876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2267583776640).

2172323777876 is an abundant number, since it is smaller than the sum of its proper divisors (2362843775404).

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

2172323777876 is a wasteful number, since it uses less digits than its factorization.

2172323777876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614 (or 2605 counting only the distinct ones).

The product of its digits is 58084992, while the sum is 62.

The spelling of 2172323777876 in words is "two trillion, one hundred seventy-two billion, three hundred twenty-three million, seven hundred seventy-seven thousand, eight hundred seventy-six".