65636442947 has 8 divisors (see below), whose sum is σ = 69259756320. Its totient is φ = 62077259200.

The previous prime is 65636442917. The next prime is 65636442967. The reversal of 65636442947 is 74924463656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65636442947 - 2²⁰ = 65635394371 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65636442892 and 65636442901.

It is not an unprimeable number, because it can be changed into a prime (65636442917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16030304 + ... + 16034397.

It is an arithmetic number, because the mean of its divisors is an integer number (8657469540).

Almost surely, 2^65636442947 is an apocalyptic number.

65636442947 is a deficient number, since it is larger than the sum of its proper divisors (3623313373).

65636442947 is a wasteful number, since it uses less digits than its factorization.

65636442947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32064813.

The product of its digits is 26127360, while the sum is 56.

The spelling of 65636442947 in words is "sixty-five billion, six hundred thirty-six million, four hundred forty-two thousand, nine hundred forty-seven".