8505113801 has 2 divisors, whose sum is σ = 8505113802. Its totient is φ = 8505113800.

The previous prime is 8505113797. The next prime is 8505113809. The reversal of 8505113801 is 1083115058.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7019088400 + 1486025401 = 83780^2 + 38549^2 .

It is a cyclic number.

It is not a de Polignac number, because 8505113801 - 2² = 8505113797 is a prime.

It is a super-4 number, since 4×8505113801⁴ (a number of 41 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (8505113809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4252556900 + 4252556901.

It is an arithmetic number, because the mean of its divisors is an integer number (4252556901).

Almost surely, 2^8505113801 is an apocalyptic number.

It is an amenable number.

8505113801 is a deficient number, since it is larger than the sum of its proper divisors (1).

8505113801 is an equidigital number, since it uses as much as digits as its factorization.

8505113801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 32.

The square root of 8505113801 is about 92223.1738827069. The cubic root of 8505113801 is about 2041.2367389487.

Adding to 8505113801 its reverse (1083115058), we get a palindrome (9588228859).

The spelling of 8505113801 in words is "eight billion, five hundred five million, one hundred thirteen thousand, eight hundred one".