261535214311 has 8 divisors (see below), whose sum is σ = 298908771840. Its totient is φ = 224164502808.

The previous prime is 261535214261. The next prime is 261535214407. The reversal of 261535214311 is 113412535162.

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 261535214311 - 2²⁵ = 261501659879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261535214911) 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, 510811 + ... + 885436.

It is an arithmetic number, because the mean of its divisors is an integer number (37363596480).

Almost surely, 2^261535214311 is an apocalyptic number.

261535214311 is a deficient number, since it is larger than the sum of its proper divisors (37373557529).

261535214311 is a wasteful number, since it uses less digits than its factorization.

261535214311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423013.

The product of its digits is 21600, while the sum is 34.

Adding to 261535214311 its reverse (113412535162), we get a palindrome (374947749473).

The spelling of 261535214311 in words is "two hundred sixty-one billion, five hundred thirty-five million, two hundred fourteen thousand, three hundred eleven".