465805561 has 16 divisors (see below), whose sum is σ = 508685184. Its totient is φ = 423972864.

The previous prime is 465805553. The next prime is 465805609. The reversal of 465805561 is 165508564.

It is a cyclic number.

It is not a de Polignac number, because 465805561 - 2³ = 465805553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (465805061) 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, 356836 + ... + 358138.

It is an arithmetic number, because the mean of its divisors is an integer number (31792824).

Almost surely, 2^465805561 is an apocalyptic number.

It is an amenable number.

465805561 is a deficient number, since it is larger than the sum of its proper divisors (42879623).

465805561 is a wasteful number, since it uses less digits than its factorization.

465805561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 465805561 is about 21582.5290686703. The cubic root of 465805561 is about 775.1782100063.

The spelling of 465805561 in words is "four hundred sixty-five million, eight hundred five thousand, five hundred sixty-one".