408309498081 has 15 divisors (see below), whose sum is σ = 609952409121. Its totient is φ = 272202498108.

The previous prime is 408309498067. The next prime is 408309498083. The reversal of 408309498081 is 180894903804.

The square root of 408309498081 is 638991.

It is a perfect power (a square), and thus also a powerful number.

408309498081 is a `hidden beast` number, since 40 + 8 + 30 + 9 + 498 + 0 + 81 = 666.

It is not a de Polignac number, because 408309498081 - 2⁵ = 408309498049 is a prime.

It is a super-2 number, since 2×408309498081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (408309498083) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5715420 + ... + 5786418.

Almost surely, 2^408309498081 is an apocalyptic number.

408309498081 is the 638991-st square number.

408309498081 is the 319496-th centered octagonal number.

It is an amenable number.

408309498081 is a deficient number, since it is larger than the sum of its proper divisors (201642911040).

408309498081 is an frugal number, since it uses more digits than its factorization.

408309498081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142010 (or 71002 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 408309498081 in words is "four hundred eight billion, three hundred nine million, four hundred ninety-eight thousand, eighty-one".