418947561 has 12 divisors (see below), whose sum is σ = 605323888. Its totient is φ = 279216504.

The previous prime is 418947539. The next prime is 418947569. The reversal of 418947561 is 165749814.

418947561 is a `hidden beast` number, since 4 + 1 + 89 + 4 + 7 + 561 = 666.

It is not a de Polignac number, because 418947561 - 2¹³ = 418939369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (418947569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57426 + ... + 64308.

Almost surely, 2^418947561 is an apocalyptic number.

It is an amenable number.

418947561 is a deficient number, since it is larger than the sum of its proper divisors (186376327).

418947561 is a wasteful number, since it uses less digits than its factorization.

418947561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13652 (or 13649 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 418947561 is about 20468.2085439835. The cubic root of 418947561 is about 748.2611931832.

It can be divided in two parts, 41894 and 7561, that added together give a triangular number (49455 = T₃₁₄).

The spelling of 418947561 in words is "four hundred eighteen million, nine hundred forty-seven thousand, five hundred sixty-one".