16061781200 has 60 divisors (see below), whose sum is σ = 39117109068. Its totient is φ = 6336691200.

The previous prime is 16061781193. The next prime is 16061781209. The reversal of 16061781200 is 218716061.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 183765136 + 15878016064 = 13556^2 + 126008^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16061781209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245831 + ... + 304230.

Almost surely, 2^16061781200 is an apocalyptic number.

16061781200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16061781200 is an abundant number, since it is smaller than the sum of its proper divisors (23055327868).

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

16061781200 is a wasteful number, since it uses less digits than its factorization.

16061781200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550152 (or 550141 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 16061781200 in words is "sixteen billion, sixty-one million, seven hundred eighty-one thousand, two hundred".