86630542847809 has 3 divisors (see below), whose sum is σ = 86630552155363. Its totient is φ = 86630533540256.

The previous prime is 86630542847791. The next prime is 86630542847881. The reversal of 86630542847809 is 90874824503668.

It is a happy number.

The square root of 86630542847809 is 9307553.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 18453682850625 + 68176859997184 = 4295775^2 + 8256928^2 .

It is not a de Polignac number, because 86630542847809 - 2⁵ = 86630542847777 is a prime.

It is a super-2 number, since 2×86630542847809² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86630542847309) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4653777 + ... + 13961329.

Almost surely, 2^{86630542847809} is an apocalyptic number.

86630542847809 is the 9307553-rd square number.

86630542847809 is the 4653777-th centered octagonal number.

It is an amenable number.

86630542847809 is a deficient number, since it is larger than the sum of its proper divisors (9307554).

86630542847809 is an frugal number, since it uses more digits than its factorization.

86630542847809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18615106 (or 9307553 counting only the distinct ones).

The product of its (nonzero) digits is 557383680, while the sum is 70.

The spelling of 86630542847809 in words is "eighty-six trillion, six hundred thirty billion, five hundred forty-two million, eight hundred forty-seven thousand, eight hundred nine".