409404663636 has 24 divisors (see below), whose sum is σ = 958802565504. Its totient is φ = 135964647360.

The previous prime is 409404663631. The next prime is 409404663649. The reversal of 409404663636 is 636366404904.

It is a happy number.

It is a super-2 number, since 2×409404663636² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409404663631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62943345 + ... + 62949848.

It is an arithmetic number, because the mean of its divisors is an integer number (39950106896).

Almost surely, 2^409404663636 is an apocalyptic number.

It is an amenable number.

409404663636 is an abundant number, since it is smaller than the sum of its proper divisors (549397901868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

409404663636 is a wasteful number, since it uses less digits than its factorization.

409404663636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125893471 (or 125893469 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 51.

The spelling of 409404663636 in words is "four hundred nine billion, four hundred four million, six hundred sixty-three thousand, six hundred thirty-six".