180009649 has 4 divisors (see below), whose sum is σ = 183060720. Its totient is φ = 176958580.

The previous prime is 180009647. The next prime is 180009659. The reversal of 180009649 is 946900081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 946900081 = 811 ⋅1167571.

It is a cyclic number.

It is not a de Polignac number, because 180009649 - 2¹ = 180009647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180009647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525447 + ... + 1525564.

It is an arithmetic number, because the mean of its divisors is an integer number (45765180).

Almost surely, 2^180009649 is an apocalyptic number.

It is an amenable number.

180009649 is a deficient number, since it is larger than the sum of its proper divisors (3051071).

180009649 is an equidigital number, since it uses as much as digits as its factorization.

180009649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051070.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 180009649 is about 13416.7674571783. The cubic root of 180009649 is about 564.6317061002.

The spelling of 180009649 in words is "one hundred eighty million, nine thousand, six hundred forty-nine".