2180747465 has 8 divisors (see below), whose sum is σ = 2818196808. Its totient is φ = 1610398080.

The previous prime is 2180747453. The next prime is 2180747467. The reversal of 2180747465 is 5647470812.

It can be written as a sum of positive squares in 4 ways, for example, as 290497936 + 1890249529 = 17044^2 + 43477^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2180747465 - 2⁴ = 2180747449 is a prime.

It is a super-2 number, since 2×2180747465² = 9511319012207852450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2180747467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16774916 + ... + 16775045.

It is an arithmetic number, because the mean of its divisors is an integer number (352274601).

Almost surely, 2^2180747465 is an apocalyptic number.

It is an amenable number.

2180747465 is a deficient number, since it is larger than the sum of its proper divisors (637449343).

2180747465 is a wasteful number, since it uses less digits than its factorization.

2180747465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33549979.

The product of its (nonzero) digits is 376320, while the sum is 44.

The square root of 2180747465 is about 46698.4739044008. The cubic root of 2180747465 is about 1296.7864344919.

The spelling of 2180747465 in words is "two billion, one hundred eighty million, seven hundred forty-seven thousand, four hundred sixty-five".