16108144821 has 24 divisors (see below), whose sum is σ = 23842629720. Its totient is φ = 10473408000.

The previous prime is 16108144813. The next prime is 16108144823. The reversal of 16108144821 is 12844180161.

16108144821 is a `hidden beast` number, since 1 + 610 + 8 + 14 + 4 + 8 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 354380625 + 15753764196 = 18825^2 + 125514^2 .

It is not a de Polignac number, because 16108144821 - 2³ = 16108144813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16108144823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1621971 + ... + 1631871.

It is an arithmetic number, because the mean of its divisors is an integer number (993442905).

Almost surely, 2^16108144821 is an apocalyptic number.

It is an amenable number.

16108144821 is a deficient number, since it is larger than the sum of its proper divisors (7734484899).

16108144821 is a wasteful number, since it uses less digits than its factorization.

16108144821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14357 (or 14354 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The spelling of 16108144821 in words is "sixteen billion, one hundred eight million, one hundred forty-four thousand, eight hundred twenty-one".