16011612369 has 9 divisors (see below), whose sum is σ = 23128432873. Its totient is φ = 10674155172.

The previous prime is 16011612349. The next prime is 16011612377. The reversal of 16011612369 is 96321611061.

The square root of 16011612369 is 126537.

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

16011612369 is a `hidden beast` number, since 1 + 6 + 0 + 1 + 1 + 612 + 36 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-16011612369 is a prime.

It is a super-2 number, since 2×16011612369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16011612349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 358522 + ... + 400700.

Almost surely, 2^16011612369 is an apocalyptic number.

16011612369 is the 126537-th square number.

16011612369 is the 63269-th centered octagonal number.

It is an amenable number.

16011612369 is a deficient number, since it is larger than the sum of its proper divisors (7116820504).

16011612369 is an frugal number, since it uses more digits than its factorization.

16011612369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84364 (or 42182 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

Multiplying 16011612369 by its sum of digits (36), we get a square (576418045284 = 759222²).

Multiplying 16011612369 by its product of nonzero digits (11664), we get a square (186759446672016 = 13665996²).

The spelling of 16011612369 in words is "sixteen billion, eleven million, six hundred twelve thousand, three hundred sixty-nine".