16540018560 has 640 divisors, whose sum is σ = 64505216160. Its totient is φ = 4031078400.

The previous prime is 16540018559. The next prime is 16540018673. The reversal of 16540018560 is 6581004561.

16540018560 is a `hidden beast` number, since 16 + 5 + 400 + 185 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 163762510 + ... + 163762610.

Almost surely, 2^16540018560 is an apocalyptic number.

16540018560 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 16540018560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32252608080).

16540018560 is an abundant number, since it is smaller than the sum of its proper divisors (47965197600).

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

16540018560 is an frugal number, since it uses more digits than its factorization.

16540018560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 16540018560 in words is "sixteen billion, five hundred forty million, eighteen thousand, five hundred sixty".