8636661965 has 16 divisors (see below), whose sum is σ = 10499673600. Its totient is φ = 6818952192.

The previous prime is 8636661953. The next prime is 8636661977. The reversal of 8636661965 is 5691666368.

It is an interprime number because it is at equal distance from previous prime (8636661953) and next prime (8636661977).

It is a cyclic number.

It is not a de Polignac number, because 8636661965 - 2²⁸ = 8368226509 is a prime.

It is a super-2 number, since 2×8636661965² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8636661965.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1843496 + ... + 1848174.

It is an arithmetic number, because the mean of its divisors is an integer number (656229600).

Almost surely, 2^8636661965 is an apocalyptic number.

It is an amenable number.

8636661965 is a deficient number, since it is larger than the sum of its proper divisors (1863011635).

8636661965 is a wasteful number, since it uses less digits than its factorization.

8636661965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9436.

The product of its digits is 8398080, while the sum is 56.

The square root of 8636661965 is about 92933.6428049606. The cubic root of 8636661965 is about 2051.7068445861.

The spelling of 8636661965 in words is "eight billion, six hundred thirty-six million, six hundred sixty-one thousand, nine hundred sixty-five".