409256457193 has 4 divisors (see below), whose sum is σ = 411767233168. Its totient is φ = 406745681220.

The previous prime is 409256457143. The next prime is 409256457209. The reversal of 409256457193 is 391754652904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 409256457193 - 2¹⁷ = 409256326121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409256457143) 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, 1255387743 + ... + 1255388068.

It is an arithmetic number, because the mean of its divisors is an integer number (102941808292).

Almost surely, 2^409256457193 is an apocalyptic number.

It is an amenable number.

409256457193 is a deficient number, since it is larger than the sum of its proper divisors (2510775975).

409256457193 is a wasteful number, since it uses less digits than its factorization.

409256457193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510775974.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 409256457193 in words is "four hundred nine billion, two hundred fifty-six million, four hundred fifty-seven thousand, one hundred ninety-three".