408405880665 has 48 divisors (see below), whose sum is σ = 717793914240. Its totient is φ = 214774882560.

The previous prime is 408405880579. The next prime is 408405880667. The reversal of 408405880665 is 566088504804.

It is not a de Polignac number, because 408405880665 - 2¹⁵ = 408405847897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (408405880667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13976220 + ... + 14005410.

It is an arithmetic number, because the mean of its divisors is an integer number (14954039880).

Almost surely, 2^408405880665 is an apocalyptic number.

408405880665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

408405880665 is a deficient number, since it is larger than the sum of its proper divisors (309388033575).

408405880665 is a wasteful number, since it uses less digits than its factorization.

408405880665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33534 (or 33531 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 54.

The spelling of 408405880665 in words is "four hundred eight billion, four hundred five million, eight hundred eighty thousand, six hundred sixty-five".