261241112871 has 8 divisors (see below), whose sum is σ = 387023870960. Its totient is φ = 174160741896.

The previous prime is 261241112857. The next prime is 261241112941. The reversal of 261241112871 is 178211142162.

261241112871 is a `hidden beast` number, since 2 + 612 + 4 + 1 + 11 + 28 + 7 + 1 = 666.

It is not a de Polignac number, because 261241112871 - 2¹⁰ = 261241111847 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 (261241112071) 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, 4837798360 + ... + 4837798413.

It is an arithmetic number, because the mean of its divisors is an integer number (48377983870).

Almost surely, 2^261241112871 is an apocalyptic number.

261241112871 is a deficient number, since it is larger than the sum of its proper divisors (125782758089).

261241112871 is an equidigital number, since it uses as much as digits as its factorization.

261241112871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9675596782 (or 9675596776 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The spelling of 261241112871 in words is "two hundred sixty-one billion, two hundred forty-one million, one hundred twelve thousand, eight hundred seventy-one".