13604189769 has 27 divisors (see below), whose sum is σ = 20883534087. Its totient is φ = 8532229824.

The previous prime is 13604189759. The next prime is 13604189789. The reversal of 13604189769 is 96798140631.

The square root of 13604189769 is 116637.

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

13604189769 is a `hidden beast` number, since 13 + 604 + 18 + 9 + 7 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10591497225 + 3012692544 = 102915^2 + 54888^2 .

It is not a de Polignac number, because 13604189769 - 2⁵ = 13604189737 is a prime.

It is a super-2 number, since 2×13604189769² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13604189759) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5947344 + ... + 5949630.

Almost surely, 2^13604189769 is an apocalyptic number.

13604189769 is the 116637-th square number.

13604189769 is the 58319-th centered octagonal number.

It is an amenable number.

13604189769 is a deficient number, since it is larger than the sum of its proper divisors (7279344318).

13604189769 is an frugal number, since it uses more digits than its factorization.

13604189769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4614 (or 2307 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 13604189769 in words is "thirteen billion, six hundred four million, one hundred eighty-nine thousand, seven hundred sixty-nine".