180646345 has 12 divisors (see below), whose sum is σ = 238274820. Its totient is φ = 131378720.

The previous prime is 180646343. The next prime is 180646351. The reversal of 180646345 is 543646081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 103978809 + 76667536 = 10197^2 + 8756^2 .

It is not a de Polignac number, because 180646345 - 2¹ = 180646343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (180646343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148690 + ... + 149899.

It is an arithmetic number, because the mean of its divisors is an integer number (19856235).

Almost surely, 2^180646345 is an apocalyptic number.

It is an amenable number.

180646345 is a deficient number, since it is larger than the sum of its proper divisors (57628475).

180646345 is a wasteful number, since it uses less digits than its factorization.

180646345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298616 (or 298605 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 180646345 is about 13440.4741359820. The cubic root of 180646345 is about 565.2966255112.

The spelling of 180646345 in words is "one hundred eighty million, six hundred forty-six thousand, three hundred forty-five".