11281208261 has 8 divisors (see below), whose sum is σ = 11686210200. Its totient is φ = 10882389760.

The previous prime is 11281208251. The next prime is 11281208269. The reversal of 11281208261 is 16280218211.

It can be written as a sum of positive squares in 4 ways, for example, as 233937025 + 11047271236 = 15295^2 + 105106^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11281208261 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 (11281208269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1542146 + ... + 1549443.

It is an arithmetic number, because the mean of its divisors is an integer number (1460776275).

Almost surely, 2^11281208261 is an apocalyptic number.

It is an amenable number.

11281208261 is a deficient number, since it is larger than the sum of its proper divisors (405001939).

11281208261 is an equidigital number, since it uses as much as digits as its factorization.

11281208261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091719.

The product of its (nonzero) digits is 3072, while the sum is 32.

The spelling of 11281208261 in words is "eleven billion, two hundred eighty-one million, two hundred eight thousand, two hundred sixty-one".