180561465 has 48 divisors (see below), whose sum is σ = 376521600. Its totient is φ = 78195456.

The previous prime is 180561439. The next prime is 180561481. The reversal of 180561465 is 564165081.

It is not a de Polignac number, because 180561465 - 2⁶ = 180561401 is a prime.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 9100 + ... + 21069.

It is an arithmetic number, because the mean of its divisors is an integer number (7844200).

Almost surely, 2^180561465 is an apocalyptic number.

180561465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

180561465 is an abundant number, since it is smaller than the sum of its proper divisors (195960135).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

180561465 is a wasteful number, since it uses less digits than its factorization.

180561465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30206 (or 30203 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 180561465 is about 13437.3161382770. The cubic root of 180561465 is about 565.2080733096.

The spelling of 180561465 in words is "one hundred eighty million, five hundred sixty-one thousand, four hundred sixty-five".