7889229494172 has 144 divisors (see below), whose sum is σ = 21918898281280. Its totient is φ = 2377751500800.

The previous prime is 7889229494143. The next prime is 7889229494189. The reversal of 7889229494172 is 2714949229887.

7889229494172 is a `hidden beast` number, since 7 + 8 + 89 + 2 + 294 + 94 + 172 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 7889229494172.

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, 6306729 + ... + 7453407.

Almost surely, 2^{7889229494172} 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 7889229494172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10959449140640).

7889229494172 is an abundant number, since it is smaller than the sum of its proper divisors (14029668787108).

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

7889229494172 is a wasteful number, since it uses less digits than its factorization.

7889229494172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147004 (or 1146999 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 72.

The spelling of 7889229494172 in words is "seven trillion, eight hundred eighty-nine billion, two hundred twenty-nine million, four hundred ninety-four thousand, one hundred seventy-two".