16200320040 has 48 divisors (see below), whose sum is σ = 52651041300. Its totient is φ = 4320085248.

The previous prime is 16200320033. The next prime is 16200320077. The reversal of 16200320040 is 4002300261.

It is a happy number.

16200320040 is a `hidden beast` number, since 1 + 620 + 0 + 3 + 2 + 0 + 0 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15030269604 + 1170050436 = 122598^2 + 34206^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 16200319995 and 16200320022.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22500085 + ... + 22500804.

Almost surely, 2^16200320040 is an apocalyptic number.

16200320040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16200320040 is an abundant number, since it is smaller than the sum of its proper divisors (36450721260).

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

16200320040 is a wasteful number, since it uses less digits than its factorization.

16200320040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45000906 (or 45000899 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The spelling of 16200320040 in words is "sixteen billion, two hundred million, three hundred twenty thousand, forty".