16653902500 has 135 divisors (see below), whose sum is σ = 38146435327. Its totient is φ = 6359584000.

The previous prime is 16653902483. The next prime is 16653902509. The reversal of 16653902500 is 520935661.

The square root of 16653902500 is 129050.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 22 ways, for example, as 11480265316 + 5173637184 = 107146^2 + 71928^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16653902500.

It is not an unprimeable number, because it can be changed into a prime (16653902509) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 187122456 + ... + 187122544.

Almost surely, 2^16653902500 is an apocalyptic number.

16653902500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16653902500 is the 129050-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16653902500

16653902500 is an abundant number, since it is smaller than the sum of its proper divisors (21492532827).

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

16653902500 is an frugal number, since it uses more digits than its factorization.

16653902500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The spelling of 16653902500 in words is "sixteen billion, six hundred fifty-three million, nine hundred two thousand, five hundred".