2560220261 has 4 divisors (see below), whose sum is σ = 2560347372. Its totient is φ = 2560093152.

The previous prime is 2560220239. The next prime is 2560220263. The reversal of 2560220261 is 1620220652.

2560220261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 285407236 + 2274813025 = 16894^2 + 47695^2 .

It is a cyclic number.

It is not a de Polignac number, because 2560220261 - 2¹⁰ = 2560219237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2560220261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560220263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25910 + ... + 76103.

It is an arithmetic number, because the mean of its divisors is an integer number (640086843).

Almost surely, 2^2560220261 is an apocalyptic number.

It is an amenable number.

2560220261 is a deficient number, since it is larger than the sum of its proper divisors (127111).

2560220261 is a wasteful number, since it uses less digits than its factorization.

2560220261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127110.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2560220261 is about 50598.6191610008. The cubic root of 2560220261 is about 1368.0199896550.

The spelling of 2560220261 in words is "two billion, five hundred sixty million, two hundred twenty thousand, two hundred sixty-one".