409798019905 has 8 divisors (see below), whose sum is σ = 493868173032. Its totient is φ = 326431383168.

The previous prime is 409798019881. The next prime is 409798019923. The reversal of 409798019905 is 509910897904.

It can be written as a sum of positive squares in 4 ways, for example, as 30706604289 + 379091415616 = 175233^2 + 615704^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 409798019905 - 2¹³ = 409798011713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175877814 + ... + 175880143.

It is an arithmetic number, because the mean of its divisors is an integer number (61733521629).

Almost surely, 2^409798019905 is an apocalyptic number.

It is an amenable number.

409798019905 is a deficient number, since it is larger than the sum of its proper divisors (84070153127).

409798019905 is a wasteful number, since it uses less digits than its factorization.

409798019905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351758195.

The product of its (nonzero) digits is 7348320, while the sum is 61.

The spelling of 409798019905 in words is "four hundred nine billion, seven hundred ninety-eight million, nineteen thousand, nine hundred five".