409659123122 has 18 divisors (see below), whose sum is σ = 620771503287. Its totient is φ = 202756288000.

The previous prime is 409659123121. The next prime is 409659123163. The reversal of 409659123122 is 221321956904.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 405299030161 + 4360092961 = 636631^2 + 66031^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=452581.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409659123121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 91419122 + ... + 91423602.

Almost surely, 2^409659123122 is an apocalyptic number.

409659123122 is a deficient number, since it is larger than the sum of its proper divisors (211112380165).

409659123122 is an frugal number, since it uses more digits than its factorization.

409659123122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166 (or 4584 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 409659123122 in words is "four hundred nine billion, six hundred fifty-nine million, one hundred twenty-three thousand, one hundred twenty-two".