493836561 has 8 divisors (see below), whose sum is σ = 731609760. Its totient is φ = 329224356.

The previous prime is 493836547. The next prime is 493836583. The reversal of 493836561 is 165638394.

493836561 is a `hidden beast` number, since 4 + 9 + 3 + 83 + 6 + 561 = 666.

It is not a de Polignac number, because 493836561 - 2²⁵ = 460282129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (493836061) 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, 9145095 + ... + 9145148.

It is an arithmetic number, because the mean of its divisors is an integer number (91451220).

Almost surely, 2^493836561 is an apocalyptic number.

It is an amenable number.

493836561 is a deficient number, since it is larger than the sum of its proper divisors (237773199).

493836561 is a wasteful number, since it uses less digits than its factorization.

493836561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18290252 (or 18290246 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 493836561 is about 22222.4337326045. The cubic root of 493836561 is about 790.4257497889.

The spelling of 493836561 in words is "four hundred ninety-three million, eight hundred thirty-six thousand, five hundred sixty-one".