2560681263 has 32 divisors (see below), whose sum is σ = 3935013376. Its totient is φ = 1450908288.

The previous prime is 2560681259. The next prime is 2560681267. The reversal of 2560681263 is 3621860652.

It is an interprime number because it is at equal distance from previous prime (2560681259) and next prime (2560681267).

It is not a de Polignac number, because 2560681263 - 2² = 2560681259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560681267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2919381 + ... + 2920257.

It is an arithmetic number, because the mean of its divisors is an integer number (122969168).

Almost surely, 2^2560681263 is an apocalyptic number.

2560681263 is a deficient number, since it is larger than the sum of its proper divisors (1374332113).

2560681263 is a wasteful number, since it uses less digits than its factorization.

2560681263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 2560681263 is about 50603.1744359976. The cubic root of 2560681263 is about 1368.1020948435.

The spelling of 2560681263 in words is "two billion, five hundred sixty million, six hundred eighty-one thousand, two hundred sixty-three".