16404551504420 has 12 divisors (see below), whose sum is σ = 34449558159324. Its totient is φ = 6561820601760.

The previous prime is 16404551504413. The next prime is 16404551504437. The reversal of 16404551504420 is 2440515540461.

It can be written as a sum of positive squares in 2 ways, for example, as 2299614536704 + 14104936967716 = 1516448^2 + 3755654^2 .

It is a super-2 number, since 2×16404551504420² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410113787591 + ... + 410113787630.

It is an arithmetic number, because the mean of its divisors is an integer number (2870796513277).

Almost surely, 2^{16404551504420} is an apocalyptic number.

16404551504420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16404551504420 is an abundant number, since it is smaller than the sum of its proper divisors (18045006654904).

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

16404551504420 is a wasteful number, since it uses less digits than its factorization.

16404551504420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820227575230 (or 820227575228 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 41.

The spelling of 16404551504420 in words is "sixteen trillion, four hundred four billion, five hundred fifty-one million, five hundred four thousand, four hundred twenty".