181316849 has 8 divisors (see below), whose sum is σ = 219408768. Its totient is φ = 146272320.

The previous prime is 181316809. The next prime is 181316879. The reversal of 181316849 is 948613181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181316849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181316809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761717 + ... + 761954.

It is an arithmetic number, because the mean of its divisors is an integer number (27426096).

Almost surely, 2^181316849 is an apocalyptic number.

It is an amenable number.

181316849 is a deficient number, since it is larger than the sum of its proper divisors (38091919).

181316849 is a wasteful number, since it uses less digits than its factorization.

181316849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523695.

The product of its digits is 41472, while the sum is 41.

The square root of 181316849 is about 13465.3944984913. The cubic root of 181316849 is about 565.9951647129.

The spelling of 181316849 in words is "one hundred eighty-one million, three hundred sixteen thousand, eight hundred forty-nine".