2681206563 has 32 divisors (see below), whose sum is σ = 4186828800. Its totient is φ = 1494281376.

The previous prime is 2681206537. The next prime is 2681206589. The reversal of 2681206563 is 3656021862.

It is an interprime number because it is at equal distance from previous prime (2681206537) and next prime (2681206589).

It is not a de Polignac number, because 2681206563 - 2¹⁴ = 2681190179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2681206763) 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, 755848 + ... + 759386.

It is an arithmetic number, because the mean of its divisors is an integer number (130838400).

Almost surely, 2^2681206563 is an apocalyptic number.

2681206563 is a deficient number, since it is larger than the sum of its proper divisors (1505622237).

2681206563 is a wasteful number, since it uses less digits than its factorization.

2681206563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431.

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

The square root of 2681206563 is about 51780.3685096968. The cubic root of 2681206563 is about 1389.2383320854.

The spelling of 2681206563 in words is "two billion, six hundred eighty-one million, two hundred six thousand, five hundred sixty-three".