261303351011 has 8 divisors (see below), whose sum is σ = 262175940000. Its totient is φ = 260430970240.

The previous prime is 261303350929. The next prime is 261303351017. The reversal of 261303351011 is 110153303162.

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

It is a cyclic number.

It is not a de Polignac number, because 261303351011 - 2¹⁰ = 261303349987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261303351017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2704565 + ... + 2799513.

It is an arithmetic number, because the mean of its divisors is an integer number (32771992500).

Almost surely, 2^261303351011 is an apocalyptic number.

261303351011 is a deficient number, since it is larger than the sum of its proper divisors (872588989).

261303351011 is an equidigital number, since it uses as much as digits as its factorization.

261303351011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104109.

The product of its (nonzero) digits is 1620, while the sum is 26.

Adding to 261303351011 its reverse (110153303162), we get a palindrome (371456654173).

The spelling of 261303351011 in words is "two hundred sixty-one billion, three hundred three million, three hundred fifty-one thousand, eleven".