65643216480 has 120 divisors (see below), whose sum is σ = 231665897232. Its totient is φ = 17504854272.

The previous prime is 65643216473. The next prime is 65643216487. The reversal of 65643216480 is 8461234656.

65643216480 is a `hidden beast` number, since 6 + 56 + 432 + 164 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (65643216473) and next prime (65643216487).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65643216487) 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 19 ways as a sum of consecutive naturals, for example, 2519572 + ... + 2545491.

Almost surely, 2^65643216480 is an apocalyptic number.

65643216480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65643216480 is an abundant number, since it is smaller than the sum of its proper divisors (166022680752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65643216480 is a wasteful number, since it uses less digits than its factorization.

65643216480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5065090 (or 5065073 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 65643216480 in words is "sixty-five billion, six hundred forty-three million, two hundred sixteen thousand, four hundred eighty".