16860497550 has 96 divisors (see below), whose sum is σ = 45165880032. Its totient is φ = 4137799680.

The previous prime is 16860497531. The next prime is 16860497561. The reversal of 16860497550 is 5579406861.

It is a super-3 number, since 3×16860497550³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16860497493 and 16860497502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 644322 + ... + 669978.

It is an arithmetic number, because the mean of its divisors is an integer number (470477917).

Almost surely, 2^16860497550 is an apocalyptic number.

16860497550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16860497550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22582940016).

16860497550 is an abundant number, since it is smaller than the sum of its proper divisors (28305382482).

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

16860497550 is a wasteful number, since it uses less digits than its factorization.

16860497550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26022 (or 26017 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 51.

The spelling of 16860497550 in words is "sixteen billion, eight hundred sixty million, four hundred ninety-seven thousand, five hundred fifty".