8636861311061 has 4 divisors (see below), whose sum is σ = 8636867580000. Its totient is φ = 8636855042124.

The previous prime is 8636861311009. The next prime is 8636861311073. The reversal of 8636861311061 is 1601131686368.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8636861311061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8636861311261) 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, 67721 + ... + 4156718.

It is an arithmetic number, because the mean of its divisors is an integer number (2159216895000).

Almost surely, 2^{8636861311061} is an apocalyptic number.

It is an amenable number.

8636861311061 is a deficient number, since it is larger than the sum of its proper divisors (6268939).

8636861311061 is a wasteful number, since it uses less digits than its factorization.

8636861311061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6268938.

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 8636861311061 in words is "eight trillion, six hundred thirty-six billion, eight hundred sixty-one million, three hundred eleven thousand, sixty-one".