2561403441 has 8 divisors (see below), whose sum is σ = 3563691840. Its totient is φ = 1633358672.

The previous prime is 2561403401. The next prime is 2561403443. The reversal of 2561403441 is 1443041652.

2561403441 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 a cyclic number.

It is not a de Polignac number, because 2561403441 - 2¹⁴ = 2561387057 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2561403399 and 2561403408.

It is not an unprimeable number, because it can be changed into a prime (2561403443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18560826 + ... + 18560963.

It is an arithmetic number, because the mean of its divisors is an integer number (445461480).

Almost surely, 2^2561403441 is an apocalyptic number.

It is an amenable number.

2561403441 is a deficient number, since it is larger than the sum of its proper divisors (1002288399).

2561403441 is a wasteful number, since it uses less digits than its factorization.

2561403441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37121815.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 2561403441 is about 50610.3096315365. The cubic root of 2561403441 is about 1368.2306960849.

The spelling of 2561403441 in words is "two billion, five hundred sixty-one million, four hundred three thousand, four hundred forty-one".