16303969969 has 81 divisors (see below), whose sum is σ = 21444972003. Its totient is φ = 12356015616.

The previous prime is 16303969963. The next prime is 16303969987. The reversal of 16303969969 is 96996930361.

The square root of 16303969969 is 127687.

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

It can be written as a sum of positive squares in 13 ways, for example, as 1787569 + 16302182400 = 1337^2 + 127680^2 .

It is not a de Polignac number, because 16303969969 - 2¹⁵ = 16303937201 is a prime.

It is a super-2 number, since 2×16303969969² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16303969963) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 440647819 + ... + 440647855.

Almost surely, 2^16303969969 is an apocalyptic number.

16303969969 is the 127687-th square number.

16303969969 is the 63844-th centered octagonal number.

It is an amenable number.

16303969969 is a deficient number, since it is larger than the sum of its proper divisors (5141002034).

16303969969 is an equidigital number, since it uses as much as digits as its factorization.

16303969969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 12754584, while the sum is 61.

The spelling of 16303969969 in words is "sixteen billion, three hundred three million, nine hundred sixty-nine thousand, nine hundred sixty-nine".