181266672 has 80 divisors (see below), whose sum is σ = 494793728. Its totient is φ = 57093120.

The previous prime is 181266599. The next prime is 181266721. The reversal of 181266672 is 276662181.

It is a self number, because there is not a number n which added to its sum of digits gives 181266672.

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, 62568 + ... + 65400.

Almost surely, 2^181266672 is an apocalyptic number.

181266672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181266672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247396864).

181266672 is an abundant number, since it is smaller than the sum of its proper divisors (313527056).

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

181266672 is a wasteful number, since it uses less digits than its factorization.

181266672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918 (or 2912 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 181266672 is about 13463.5311861339. The cubic root of 181266672 is about 565.9429493788.

The spelling of 181266672 in words is "one hundred eighty-one million, two hundred sixty-six thousand, six hundred seventy-two".