418475728609 has 3 divisors (see below), whose sum is σ = 418476375507. Its totient is φ = 418475081712.

The previous prime is 418475728589. The next prime is 418475728633. The reversal of 418475728609 is 906827574814.

The square root of 418475728609 is 646897.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 132601581025 + 285874147584 = 364145^2 + 534672^2 .

It is not a de Polignac number, because 418475728609 - 2¹³ = 418475720417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (418475758609) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 323449 + ... + 970345.

It is an arithmetic number, because the mean of its divisors is an integer number (139492125169).

Almost surely, 2^418475728609 is an apocalyptic number.

418475728609 is the 646897-th square number.

418475728609 is the 323449-th centered octagonal number.

It is an amenable number.

418475728609 is a deficient number, since it is larger than the sum of its proper divisors (646898).

418475728609 is an frugal number, since it uses more digits than its factorization.

418475728609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293794 (or 646897 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 418475728609 in words is "four hundred eighteen billion, four hundred seventy-five million, seven hundred twenty-eight thousand, six hundred nine".