2661255289 has 16 divisors (see below), whose sum is σ = 3320570880. Its totient is φ = 2072054160.

The previous prime is 2661255287. The next prime is 2661255329. The reversal of 2661255289 is 9825521662.

It is a happy number.

It is not a de Polignac number, because 2661255289 - 2¹ = 2661255287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661255287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88462 + ... + 114664.

It is an arithmetic number, because the mean of its divisors is an integer number (207535680).

Almost surely, 2^2661255289 is an apocalyptic number.

It is an amenable number.

2661255289 is a deficient number, since it is larger than the sum of its proper divisors (659315591).

2661255289 is a wasteful number, since it uses less digits than its factorization.

2661255289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27540.

The product of its digits is 518400, while the sum is 46.

The square root of 2661255289 is about 51587.3559023914. The cubic root of 2661255289 is about 1385.7839035655.

The spelling of 2661255289 in words is "two billion, six hundred sixty-one million, two hundred fifty-five thousand, two hundred eighty-nine".