475156809 has 12 divisors (see below), whose sum is σ = 708477952. Its totient is φ = 306552600.

The previous prime is 475156777. The next prime is 475156813. The reversal of 475156809 is 908651574.

It is not a de Polignac number, because 475156809 - 2⁵ = 475156777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (475156859) 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, 851257 + ... + 851814.

Almost surely, 2^475156809 is an apocalyptic number.

It is an amenable number.

475156809 is a deficient number, since it is larger than the sum of its proper divisors (233321143).

475156809 is a wasteful number, since it uses less digits than its factorization.

475156809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703108 (or 1703105 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 475156809 is about 21798.0918660327. The cubic root of 475156809 is about 780.3312252038.

The spelling of 475156809 in words is "four hundred seventy-five million, one hundred fifty-six thousand, eight hundred nine".