478180561 has 4 divisors (see below), whose sum is σ = 482915124. Its totient is φ = 473446000.

The previous prime is 478180529. The next prime is 478180567. The reversal of 478180561 is 165081874.

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 274233600 + 203946961 = 16560^2 + 14281^2 .

It is a cyclic number.

It is not a de Polignac number, because 478180561 - 2⁵ = 478180529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478180567) 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, 2367130 + ... + 2367331.

It is an arithmetic number, because the mean of its divisors is an integer number (120728781).

Almost surely, 2^478180561 is an apocalyptic number.

It is an amenable number.

478180561 is a deficient number, since it is larger than the sum of its proper divisors (4734563).

478180561 is a wasteful number, since it uses less digits than its factorization.

478180561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4734562.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 478180561 is about 21867.3400531478. The cubic root of 478180561 is about 781.9829891229.

The spelling of 478180561 in words is "four hundred seventy-eight million, one hundred eighty thousand, five hundred sixty-one".