404165881504 has 144 divisors (see below), whose sum is σ = 1011576426336. Its totient is φ = 157183756800.

The previous prime is 404165881487. The next prime is 404165881549. The reversal of 404165881504 is 405188561404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9689814 + ... + 9731434.

It is an arithmetic number, because the mean of its divisors is an integer number (7024836294).

Almost surely, 2^404165881504 is an apocalyptic number.

404165881504 is a gapful number since it is divisible by the number (44) 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 404165881504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505788213168).

404165881504 is an abundant number, since it is smaller than the sum of its proper divisors (607410544832).

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

404165881504 is a wasteful number, since it uses less digits than its factorization.

404165881504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42219 (or 42204 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 404165881504 in words is "four hundred four billion, one hundred sixty-five million, eight hundred eighty-one thousand, five hundred four".