16540036821738 has 48 divisors (see below), whose sum is σ = 35884683525600. Its totient is φ = 5505974549280.

The previous prime is 16540036821713. The next prime is 16540036821817. The reversal of 16540036821738 is 83712863004561.

16540036821738 is a `hidden beast` number, since 1 + 6 + 5 + 400 + 3 + 68 + 2 + 173 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51647953 + ... + 51967211.

It is an arithmetic number, because the mean of its divisors is an integer number (747597573450).

Almost surely, 2^{16540036821738} is an apocalyptic number.

16540036821738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16540036821738 is an abundant number, since it is smaller than the sum of its proper divisors (19344646703862).

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

16540036821738 is a wasteful number, since it uses less digits than its factorization.

16540036821738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323107 (or 323104 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 16540036821738 in words is "sixteen trillion, five hundred forty billion, thirty-six million, eight hundred twenty-one thousand, seven hundred thirty-eight".