16402500000 has 432 divisors, whose sum is σ = 60545059848. Its totient is φ = 4374000000.

The previous prime is 16402499969. The next prime is 16402500041. The reversal of 16402500000 is 520461.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

16402500000 is a `hidden beast` number, since 1 + 640 + 25 + 0 + 0 + 0 + 0 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9893883024 + 6508616976 = 99468^2 + 80676^2 .

It is a tau number, because it is divible by the number of its divisors (432).

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

It is a nialpdrome in base 15.

It is a zygodrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3280499998 + ... + 3280500002.

Almost surely, 2^16402500000 is an apocalyptic number.

16402500000 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 16402500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30272529924).

16402500000 is an abundant number, since it is smaller than the sum of its proper divisors (44142559848).

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

16402500000 is an frugal number, since it uses more digits than its factorization.

16402500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The spelling of 16402500000 in words is "sixteen billion, four hundred two million, five hundred thousand".