455563661 has 4 divisors (see below), whose sum is σ = 520644192. Its totient is φ = 390483132.

The previous prime is 455563651. The next prime is 455563709. The reversal of 455563661 is 166365554.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166365554 = 2 ⋅83182777.

It is a cyclic number.

It is not a de Polignac number, because 455563661 - 2¹⁰ = 455562637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (455563651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32540255 + ... + 32540268.

It is an arithmetic number, because the mean of its divisors is an integer number (130161048).

Almost surely, 2^455563661 is an apocalyptic number.

It is an amenable number.

455563661 is a deficient number, since it is larger than the sum of its proper divisors (65080531).

455563661 is an equidigital number, since it uses as much as digits as its factorization.

455563661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65080530.

The product of its digits is 324000, while the sum is 41.

The square root of 455563661 is about 21343.9373359275. The cubic root of 455563661 is about 769.4546433553.

The spelling of 455563661 in words is "four hundred fifty-five million, five hundred sixty-three thousand, six hundred sixty-one".