261106870811 has 4 divisors (see below), whose sum is σ = 263502346800. Its totient is φ = 258711394824.

The previous prime is 261106870799. The next prime is 261106870823. The reversal of 261106870811 is 118078601162.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (261106870799) and next prime (261106870823).

It is a cyclic number.

It is not a de Polignac number, because 261106870811 - 2¹⁰ = 261106869787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261106875811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197737831 + ... + 1197738048.

It is an arithmetic number, because the mean of its divisors is an integer number (65875586700).

Almost surely, 2^261106870811 is an apocalyptic number.

261106870811 is a deficient number, since it is larger than the sum of its proper divisors (2395475989).

261106870811 is a wasteful number, since it uses less digits than its factorization.

261106870811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395475988.

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 261106870811 in words is "two hundred sixty-one billion, one hundred six million, eight hundred seventy thousand, eight hundred eleven".