8523209811 has 16 divisors (see below), whose sum is σ = 12230029728. Its totient is φ = 5260224000.

The previous prime is 8523209803. The next prime is 8523209833. The reversal of 8523209811 is 1189023258.

It is not a de Polignac number, because 8523209811 - 2³ = 8523209803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8523209811.

It is not an unprimeable number, because it can be changed into a prime (8523209801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1366740 + ... + 1372961.

It is an arithmetic number, because the mean of its divisors is an integer number (764376858).

Almost surely, 2^8523209811 is an apocalyptic number.

8523209811 is a deficient number, since it is larger than the sum of its proper divisors (3706819917).

8523209811 is a wasteful number, since it uses less digits than its factorization.

8523209811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739782.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 8523209811 is about 92321.2316371483. The cubic root of 8523209811 is about 2042.6834009162.

The spelling of 8523209811 in words is "eight billion, five hundred twenty-three million, two hundred nine thousand, eight hundred eleven".