475611561 has 16 divisors (see below), whose sum is σ = 709104000. Its totient is φ = 315051984.

The previous prime is 475611557. The next prime is 475611593. The reversal of 475611561 is 165116574.

It is a happy number.

475611561 is a `hidden beast` number, since 47 + 56 + 1 + 1 + 561 = 666.

It is not a de Polignac number, because 475611561 - 2² = 475611557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (475611541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51861 + ... + 60338.

It is an arithmetic number, because the mean of its divisors is an integer number (44319000).

Almost surely, 2^475611561 is an apocalyptic number.

It is an amenable number.

475611561 is a deficient number, since it is larger than the sum of its proper divisors (233492439).

475611561 is a wasteful number, since it uses less digits than its factorization.

475611561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112365 (or 112359 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 475611561 is about 21808.5203762199. The cubic root of 475611561 is about 780.5800862342.

The spelling of 475611561 in words is "four hundred seventy-five million, six hundred eleven thousand, five hundred sixty-one".