408513994985 has 8 divisors (see below), whose sum is σ = 490222345536. Its totient is φ = 326807494960.

The previous prime is 408513994981. The next prime is 408513994991. The reversal of 408513994985 is 589499315804.

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

It is not a de Polignac number, because 408513994985 - 2² = 408513994981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408513994981) 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, 81140 + ... + 907530.

It is an arithmetic number, because the mean of its divisors is an integer number (61277793192).

Almost surely, 2^408513994985 is an apocalyptic number.

It is an amenable number.

408513994985 is a deficient number, since it is larger than the sum of its proper divisors (81708350551).

408513994985 is an equidigital number, since it uses as much as digits as its factorization.

408513994985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925263.

The product of its (nonzero) digits is 55987200, while the sum is 65.

The spelling of 408513994985 in words is "four hundred eight billion, five hundred thirteen million, nine hundred ninety-four thousand, nine hundred eighty-five".