8684711261 has 4 divisors (see below), whose sum is σ = 8748103452. Its totient is φ = 8621319072.

The previous prime is 8684711251. The next prime is 8684711279. The reversal of 8684711261 is 1621174868.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4051322500 + 4633388761 = 63650^2 + 68069^2 .

It is a cyclic number.

It is not a de Polignac number, because 8684711261 - 2²⁶ = 8617602397 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 (8684711251) 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, 31695890 + ... + 31696163.

It is an arithmetic number, because the mean of its divisors is an integer number (2187025863).

Almost surely, 2^8684711261 is an apocalyptic number.

It is an amenable number.

8684711261 is a deficient number, since it is larger than the sum of its proper divisors (63392191).

8684711261 is a wasteful number, since it uses less digits than its factorization.

8684711261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63392190.

The product of its digits is 129024, while the sum is 44.

The square root of 8684711261 is about 93191.7982496314. The cubic root of 8684711261 is about 2055.5046395168.

The spelling of 8684711261 in words is "eight billion, six hundred eighty-four million, seven hundred eleven thousand, two hundred sixty-one".