12172241787876 has 81 divisors (see below), whose sum is σ = 31867887939433. Its totient is φ = 3917307727200.

The previous prime is 12172241787857. The next prime is 12172241787919. The reversal of 12172241787876 is 67878714227121.

It is a happy number.

The square root of 12172241787876 is 3488874.

It is a perfect power (a square), and thus also a powerful number.

12172241787876 is a `hidden beast` number, since 1 + 2 + 1 + 72 + 2 + 417 + 87 + 8 + 76 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6382828333476 + 5789413454400 = 2526426^2 + 2406120^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 607054051 + ... + 607074101.

Almost surely, 2^{12172241787876} is an apocalyptic number.

12172241787876 is the 3488874-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12172241787876

12172241787876 is an abundant number, since it is smaller than the sum of its proper divisors (19695646151557).

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

12172241787876 is an frugal number, since it uses more digits than its factorization.

12172241787876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40170 (or 20085 counting only the distinct ones).

The product of its digits is 29503488, while the sum is 63.

The spelling of 12172241787876 in words is "twelve trillion, one hundred seventy-two billion, two hundred forty-one million, seven hundred eighty-seven thousand, eight hundred seventy-six".