2561675769 has 9 divisors (see below), whose sum is σ = 3700417669. Its totient is φ = 1707682620.

The previous prime is 2561675749. The next prime is 2561675839. The reversal of 2561675769 is 9675761652.

The square root of 2561675769 is 50613.

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

2561675769 is a `hidden beast` number, since 2 + 5 + 6 + 1 + 67 + 576 + 9 = 666.

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

It is not a de Polignac number, because 2561675769 - 2⁵ = 2561675737 is a prime.

It is a super-2 number, since 2×2561675769² = 13124365490963482722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2561675749) 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, 143404 + ... + 160274.

Almost surely, 2^2561675769 is an apocalyptic number.

2561675769 is the 50613-rd square number.

2561675769 is the 25307-th centered octagonal number.

It is an amenable number.

2561675769 is a deficient number, since it is larger than the sum of its proper divisors (1138741900).

2561675769 is an frugal number, since it uses more digits than its factorization.

2561675769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33748 (or 16874 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 54.

The cubic root of 2561675769 is about 1368.2791843887.

The spelling of 2561675769 in words is "two billion, five hundred sixty-one million, six hundred seventy-five thousand, seven hundred sixty-nine".