16877321086428 has 192 divisors, whose sum is σ = 48493018828800. Its totient is φ = 5033608297920.

The previous prime is 16877321086393. The next prime is 16877321086453. The reversal of 16877321086428 is 82468012377861.

It is a happy number.

16877321086428 is a `hidden beast` number, since 1 + 6 + 8 + 77 + 32 + 108 + 6 + 428 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19522243 + ... + 20368421.

It is an arithmetic number, because the mean of its divisors is an integer number (252567806400).

Almost surely, 2^{16877321086428} is an apocalyptic number.

16877321086428 is a gapful number since it is divisible by the number (18) 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 16877321086428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24246509414400).

16877321086428 is an abundant number, since it is smaller than the sum of its proper divisors (31615697742372).

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

16877321086428 is a wasteful number, since it uses less digits than its factorization.

16877321086428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846469 (or 846461 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 63.

The spelling of 16877321086428 in words is "sixteen trillion, eight hundred seventy-seven billion, three hundred twenty-one million, eighty-six thousand, four hundred twenty-eight".