261111135241 has 8 divisors (see below), whose sum is σ = 289099982304. Its totient is φ = 233830866720.

The previous prime is 261111135239. The next prime is 261111135253. The reversal of 261111135241 is 142531111162.

It is a happy number.

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

It is not a de Polignac number, because 261111135241 - 2¹ = 261111135239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261111135211) 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, 177143860 + ... + 177145333.

It is an arithmetic number, because the mean of its divisors is an integer number (36137497788).

Almost surely, 2^261111135241 is an apocalyptic number.

It is an amenable number.

261111135241 is a deficient number, since it is larger than the sum of its proper divisors (27988847063).

261111135241 is a wasteful number, since it uses less digits than its factorization.

261111135241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354289271.

The product of its digits is 1440, while the sum is 28.

The spelling of 261111135241 in words is "two hundred sixty-one billion, one hundred eleven million, one hundred thirty-five thousand, two hundred forty-one".