8564519412 has 18 divisors (see below), whose sum is σ = 21649201938. Its totient is φ = 2854839792.

The previous prime is 8564519387. The next prime is 8564519417. The reversal of 8564519412 is 2149154658.

It can be written as a sum of positive squares in only one way, i.e., 7985924496 + 578594916 = 89364^2 + 24054^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8564519417) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118951623 + ... + 118951694.

It is an arithmetic number, because the mean of its divisors is an integer number (1202733441).

Almost surely, 2^8564519412 is an apocalyptic number.

It is an amenable number.

8564519412 is an abundant number, since it is smaller than the sum of its proper divisors (13084682526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8564519412 is a wasteful number, since it uses less digits than its factorization.

8564519412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237903327 (or 237903322 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 8564519412 is about 92544.6887292836. The cubic root of 8564519412 is about 2045.9781876629.

The spelling of 8564519412 in words is "eight billion, five hundred sixty-four million, five hundred nineteen thousand, four hundred twelve".