180780447 has 12 divisors (see below), whose sum is σ = 242793096. Its totient is φ = 119646720.

The previous prime is 180780433. The next prime is 180780463. The reversal of 180780447 is 744087081.

It is a de Polignac number, because none of the positive numbers 2^k-180780447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180780427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313023 + ... + 313599.

It is an arithmetic number, because the mean of its divisors is an integer number (20232758).

Almost surely, 2^180780447 is an apocalyptic number.

180780447 is a deficient number, since it is larger than the sum of its proper divisors (62012649).

180780447 is an frugal number, since it uses more digits than its factorization.

180780447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 180780447 is about 13445.4619481816. The cubic root of 180780447 is about 565.4364727126.

It can be divided in two parts, 1807804 and 47, that added together give a triangular number (1807851 = T₁₉₀₁).

The spelling of 180780447 in words is "one hundred eighty million, seven hundred eighty thousand, four hundred forty-seven".