494554561 has 4 divisors (see below), whose sum is σ = 495504324. Its totient is φ = 493604800.

The previous prime is 494554559. The next prime is 494554573. The reversal of 494554561 is 165455494.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 343731600 + 150822961 = 18540^2 + 12281^2 .

It is a cyclic number.

It is not a de Polignac number, because 494554561 - 2¹ = 494554559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494554061) 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, 474100 + ... + 475141.

It is an arithmetic number, because the mean of its divisors is an integer number (123876081).

Almost surely, 2^494554561 is an apocalyptic number.

It is an amenable number.

494554561 is a deficient number, since it is larger than the sum of its proper divisors (949763).

494554561 is an equidigital number, since it uses as much as digits as its factorization.

494554561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949762.

The product of its digits is 432000, while the sum is 43.

The square root of 494554561 is about 22238.5827111352. The cubic root of 494554561 is about 790.8086368336.

The spelling of 494554561 in words is "four hundred ninety-four million, five hundred fifty-four thousand, five hundred sixty-one".