406186561 has 8 divisors (see below), whose sum is σ = 444175200. Its totient is φ = 368375040.

The previous prime is 406186519. The next prime is 406186567. The reversal of 406186561 is 165681604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 406186561 - 2¹³ = 406178369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406186561.

It is not an unprimeable number, because it can be changed into a prime (406186567) 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 7 ways as a sum of consecutive naturals, for example, 39456 + ... + 48673.

It is an arithmetic number, because the mean of its divisors is an integer number (55521900).

Almost surely, 2^406186561 is an apocalyptic number.

It is an amenable number.

406186561 is a deficient number, since it is larger than the sum of its proper divisors (37988639).

406186561 is a wasteful number, since it uses less digits than its factorization.

406186561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88559.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 406186561 is about 20154.0705813987. The cubic root of 406186561 is about 740.5854637538.

The spelling of 406186561 in words is "four hundred six million, one hundred eighty-six thousand, five hundred sixty-one".