65808945646 has 8 divisors (see below), whose sum is σ = 98843821560. Its totient is φ = 32861005128.

The previous prime is 65808945637. The next prime is 65808945647. The reversal of 65808945646 is 64654980856.

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

It is a super-3 number, since 3×65808945646³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65808945647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21731956 + ... + 21734983.

It is an arithmetic number, because the mean of its divisors is an integer number (12355477695).

Almost surely, 2^65808945646 is an apocalyptic number.

65808945646 is a deficient number, since it is larger than the sum of its proper divisors (33034875914).

65808945646 is a wasteful number, since it uses less digits than its factorization.

65808945646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43467698.

The product of its (nonzero) digits is 49766400, while the sum is 61.

The spelling of 65808945646 in words is "sixty-five billion, eight hundred eight million, nine hundred forty-five thousand, six hundred forty-six".