65428564643 has 8 divisors (see below), whose sum is σ = 70815612000. Its totient is φ = 60092100288.

The previous prime is 65428564637. The next prime is 65428564699. The reversal of 65428564643 is 34646582456.

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 65428564643 - 2²⁰ = 65427516067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65428564603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12643058 + ... + 12648231.

It is an arithmetic number, because the mean of its divisors is an integer number (8851951500).

Almost surely, 2^65428564643 is an apocalyptic number.

65428564643 is a deficient number, since it is larger than the sum of its proper divisors (5387047357).

65428564643 is a wasteful number, since it uses less digits than its factorization.

65428564643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25291501.

The product of its digits is 16588800, while the sum is 53.

The spelling of 65428564643 in words is "sixty-five billion, four hundred twenty-eight million, five hundred sixty-four thousand, six hundred forty-three".