408491781156 has 96 divisors (see below), whose sum is σ = 1064301638400. Its totient is φ = 135490613760.

The previous prime is 408491781119. The next prime is 408491781163. The reversal of 408491781156 is 651187194804.

408491781156 is a `hidden beast` number, since 408 + 4 + 9 + 1 + 7 + 81 + 156 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19907430 + ... + 19927938.

It is an arithmetic number, because the mean of its divisors is an integer number (11086475400).

Almost surely, 2^408491781156 is an apocalyptic number.

It is an amenable number.

408491781156 is an abundant number, since it is smaller than the sum of its proper divisors (655809857244).

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

408491781156 is a wasteful number, since it uses less digits than its factorization.

408491781156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21426 (or 21418 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 408491781156 in words is "four hundred eight billion, four hundred ninety-one million, seven hundred eighty-one thousand, one hundred fifty-six".