16405644060 has 288 divisors, whose sum is σ = 55176593472. Its totient is φ = 3919933440.

The previous prime is 16405644029. The next prime is 16405644067. The reversal of 16405644060 is 6044650461.

16405644060 is a `hidden beast` number, since 1 + 6 + 4 + 0 + 5 + 644 + 0 + 6 + 0 = 666.

16405644060 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16405644067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29453302 + ... + 29453858.

It is an arithmetic number, because the mean of its divisors is an integer number (191585394).

Almost surely, 2^16405644060 is an apocalyptic number.

16405644060 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 16405644060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27588296736).

16405644060 is an abundant number, since it is smaller than the sum of its proper divisors (38770949412).

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

16405644060 is a wasteful number, since it uses less digits than its factorization.

16405644060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 16405644060 in words is "sixteen billion, four hundred five million, six hundred forty-four thousand, sixty".