16557086904420 has 24 divisors (see below), whose sum is σ = 46359843332544. Its totient is φ = 4415223174496.

The previous prime is 16557086904343. The next prime is 16557086904427. The reversal of 16557086904420 is 2440968075561.

16557086904420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16557086904427) 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, 137975724144 + ... + 137975724263.

It is an arithmetic number, because the mean of its divisors is an integer number (1931660138856).

Almost surely, 2^{16557086904420} is an apocalyptic number.

16557086904420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16557086904420 is an abundant number, since it is smaller than the sum of its proper divisors (29802756428124).

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

16557086904420 is a wasteful number, since it uses less digits than its factorization.

16557086904420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275951448419 (or 275951448417 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 57.

The spelling of 16557086904420 in words is "sixteen trillion, five hundred fifty-seven billion, eighty-six million, nine hundred four thousand, four hundred twenty".