408451669920 has 576 divisors, whose sum is σ = 1647254568960. Its totient is φ = 90189158400.

The previous prime is 408451669907. The next prime is 408451669939. The reversal of 408451669920 is 29966154804.

408451669920 is a `hidden beast` number, since 40 + 8 + 4 + 516 + 69 + 9 + 20 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 309667021 + ... + 309668339.

It is an arithmetic number, because the mean of its divisors is an integer number (2859816960).

Almost surely, 2^408451669920 is an apocalyptic number.

408451669920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 408451669920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (823627284480).

408451669920 is an abundant number, since it is smaller than the sum of its proper divisors (1238802899040).

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

408451669920 is a wasteful number, since it uses less digits than its factorization.

408451669920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369 (or 2358 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 408451669920 in words is "four hundred eight billion, four hundred fifty-one million, six hundred sixty-nine thousand, nine hundred twenty".