2172011776 has 144 divisors (see below), whose sum is σ = 4944844800. Its totient is φ = 943257600.

The previous prime is 2172011761. The next prime is 2172011791. The reversal of 2172011776 is 6771102712.

It is an interprime number because it is at equal distance from previous prime (2172011761) and next prime (2172011791).

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, 12134055 + ... + 12134233.

It is an arithmetic number, because the mean of its divisors is an integer number (34339200).

Almost surely, 2^2172011776 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 2172011776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2472422400).

2172011776 is an abundant number, since it is smaller than the sum of its proper divisors (2772833024).

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

2172011776 is a wasteful number, since it uses less digits than its factorization.

2172011776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 34.

The square root of 2172011776 is about 46604.8471298855. The cubic root of 2172011776 is about 1295.0525514469.

The spelling of 2172011776 in words is "two billion, one hundred seventy-two million, eleven thousand, seven hundred seventy-six".