2881256261 has 16 divisors (see below), whose sum is σ = 3126816000. Its totient is φ = 2639199360.

The previous prime is 2881256251. The next prime is 2881256269. The reversal of 2881256261 is 1626521882.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2881256261 - 2²⁶ = 2814147397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2881256269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 959240 + ... + 962238.

It is an arithmetic number, because the mean of its divisors is an integer number (195426000).

Almost surely, 2^2881256261 is an apocalyptic number.

It is an amenable number.

2881256261 is a deficient number, since it is larger than the sum of its proper divisors (245559739).

2881256261 is a wasteful number, since it uses less digits than its factorization.

2881256261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556.

The product of its digits is 92160, while the sum is 41.

The square root of 2881256261 is about 53677.3347046964. The cubic root of 2881256261 is about 1422.9641614623.

The spelling of 2881256261 in words is "two billion, eight hundred eighty-one million, two hundred fifty-six thousand, two hundred sixty-one".