16540372800 has 672 divisors, whose sum is σ = 69845529600. Its totient is φ = 3729438720.

The previous prime is 16540372769. The next prime is 16540372817. The reversal of 16540372800 is 827304561.

16540372800 is a `hidden beast` number, since 1 + 6 + 540 + 37 + 2 + 80 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

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 95 ways as a sum of consecutive naturals, for example, 25098871 + ... + 25099529.

It is an arithmetic number, because the mean of its divisors is an integer number (103936800).

Almost surely, 2^16540372800 is an apocalyptic number.

16540372800 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 16540372800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34922764800).

16540372800 is an abundant number, since it is smaller than the sum of its proper divisors (53305156800).

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

16540372800 is a wasteful number, since it uses less digits than its factorization.

16540372800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 16540372800 in words is "sixteen billion, five hundred forty million, three hundred seventy-two thousand, eight hundred".