181004692272 has 80 divisors (see below), whose sum is σ = 479762626560. Its totient is φ = 58769625600.

The previous prime is 181004692259. The next prime is 181004692279. The reversal of 181004692272 is 272296400181.

It is not an unprimeable number, because it can be changed into a prime (181004692279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1168929 + ... + 1314687.

It is an arithmetic number, because the mean of its divisors is an integer number (5997032832).

Almost surely, 2^181004692272 is an apocalyptic number.

181004692272 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 181004692272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239881313280).

181004692272 is an abundant number, since it is smaller than the sum of its proper divisors (298757934288).

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

181004692272 is a wasteful number, since it uses less digits than its factorization.

181004692272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146442 (or 146436 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 181004692272 in words is "one hundred eighty-one billion, four million, six hundred ninety-two thousand, two hundred seventy-two".