8136363561 has 4 divisors (see below), whose sum is σ = 10848484752. Its totient is φ = 5424242372.

The previous prime is 8136363539. The next prime is 8136363577. The reversal of 8136363561 is 1653636318.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8136363561 - 2²¹ = 8134266409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8136363161) 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, 1356060591 + ... + 1356060596.

It is an arithmetic number, because the mean of its divisors is an integer number (2712121188).

Almost surely, 2^8136363561 is an apocalyptic number.

It is an amenable number.

8136363561 is a deficient number, since it is larger than the sum of its proper divisors (2712121191).

8136363561 is a wasteful number, since it uses less digits than its factorization.

8136363561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712121190.

The product of its digits is 233280, while the sum is 42.

The square root of 8136363561 is about 90201.7935575563. The cubic root of 8136363561 is about 2011.2996685973.

Adding to 8136363561 its reverse (1653636318), we get a palindrome (9789999879).

The spelling of 8136363561 in words is "eight billion, one hundred thirty-six million, three hundred sixty-three thousand, five hundred sixty-one".