16519960900 has 27 divisors (see below), whose sum is σ = 35851104471. Its totient is φ = 6607470240.

The previous prime is 16519960871. The next prime is 16519960907. The reversal of 16519960900 is 906991561.

The square root of 16519960900 is 128530.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2626152516 + 13893808384 = 51246^2 + 117872^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16519960907) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1278874 + ... + 1291726.

Almost surely, 2^16519960900 is an apocalyptic number.

16519960900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16519960900 is the 128530-th square number.

It is an amenable number.

16519960900 is an abundant number, since it is smaller than the sum of its proper divisors (19331143571).

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

16519960900 is an frugal number, since it uses more digits than its factorization.

16519960900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25720 (or 12860 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 46.

The spelling of 16519960900 in words is "sixteen billion, five hundred nineteen million, nine hundred sixty thousand, nine hundred".