181634049 has 8 divisors (see below), whose sum is σ = 269087520. Its totient is φ = 121089348.

The previous prime is 181634041. The next prime is 181634071. The reversal of 181634049 is 940436181.

181634049 is a `hidden beast` number, since 18 + 1 + 634 + 0 + 4 + 9 = 666.

It is not a de Polignac number, because 181634049 - 2³ = 181634041 is a prime.

It is a super-2 number, since 2×181634049² = 65981855512268802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (181634041) 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, 3363567 + ... + 3363620.

It is an arithmetic number, because the mean of its divisors is an integer number (33635940).

Almost surely, 2^181634049 is an apocalyptic number.

It is an amenable number.

181634049 is a deficient number, since it is larger than the sum of its proper divisors (87453471).

181634049 is an equidigital number, since it uses as much as digits as its factorization.

181634049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6727196 (or 6727190 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 181634049 is about 13477.1676920635. The cubic root of 181634049 is about 566.3250275568.

The spelling of 181634049 in words is "one hundred eighty-one million, six hundred thirty-four thousand, forty-nine".