16686539729860 has 576 divisors, whose sum is σ = 51011060276736. Its totient is φ = 4491351244800.

The previous prime is 16686539729807. The next prime is 16686539729957. The reversal of 16686539729860 is 6892793568661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 397836490 + ... + 397878430.

It is an arithmetic number, because the mean of its divisors is an integer number (88560868536).

Almost surely, 2^{16686539729860} is an apocalyptic number.

16686539729860 is a gapful number since it is divisible by the number (10) 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 16686539729860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25505530138368).

16686539729860 is an abundant number, since it is smaller than the sum of its proper divisors (34324520546876).

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

16686539729860 is a wasteful number, since it uses less digits than its factorization.

16686539729860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42172 (or 42163 counting only the distinct ones).

The product of its (nonzero) digits is 1410877440, while the sum is 76.

The spelling of 16686539729860 in words is "sixteen trillion, six hundred eighty-six billion, five hundred thirty-nine million, seven hundred twenty-nine thousand, eight hundred sixty".