180449445 has 16 divisors (see below), whose sum is σ = 314966592. Its totient is φ = 87490560.

The previous prime is 180449443. The next prime is 180449447. The reversal of 180449445 is 544944081.

It is an interprime number because it is at equal distance from previous prime (180449443) and next prime (180449447).

It is not a de Polignac number, because 180449445 - 2¹ = 180449443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180449443) 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, 546652 + ... + 546981.

It is an arithmetic number, because the mean of its divisors is an integer number (19685412).

Almost surely, 2^180449445 is an apocalyptic number.

180449445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

180449445 is a deficient number, since it is larger than the sum of its proper divisors (134517147).

180449445 is a wasteful number, since it uses less digits than its factorization.

180449445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093652.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 180449445 is about 13433.1472485044. The cubic root of 180449445 is about 565.0911644474.

The spelling of 180449445 in words is "one hundred eighty million, four hundred forty-nine thousand, four hundred forty-five".