2561613 has 8 divisors (see below), whose sum is σ = 3436608. Its totient is φ = 1697184.

The previous prime is 2561593. The next prime is 2561627. The reversal of 2561613 is 3161652.

2561613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2561613 - 2⁶ = 2561549 is a prime.

It is a super-2 number, since 2×2561613² = 13123722323538, which contains 22 as substring.

2561613 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2056 + ... + 3057.

It is an arithmetic number, because the mean of its divisors is an integer number (429576).

2^2561613 is an apocalyptic number.

It is an amenable number.

2561613 is a deficient number, since it is larger than the sum of its proper divisors (874995).

2561613 is a wasteful number, since it uses less digits than its factorization.

2561613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5283.

The product of its digits is 1080, while the sum is 24.

The square root of 2561613 is about 1600.5039831253. The cubic root of 2561613 is about 136.8268008603.

The spelling of 2561613 in words is "two million, five hundred sixty-one thousand, six hundred thirteen".