65645483481 has 16 divisors (see below), whose sum is σ = 97962446400. Its totient is φ = 43444210464.

The previous prime is 65645483447. The next prime is 65645483483. The reversal of 65645483481 is 18438454656.

65645483481 is a `hidden beast` number, since 6 + 5 + 64 + 548 + 34 + 8 + 1 = 666.

It is not a de Polignac number, because 65645483481 - 2¹⁰ = 65645482457 is a prime.

It is a super-2 number, since 2×65645483481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65645483483) 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 15 ways as a sum of consecutive naturals, for example, 8869711 + ... + 8877108.

It is an arithmetic number, because the mean of its divisors is an integer number (6122652900).

Almost surely, 2^65645483481 is an apocalyptic number.

It is an amenable number.

65645483481 is a deficient number, since it is larger than the sum of its proper divisors (32316962919).

65645483481 is a wasteful number, since it uses less digits than its factorization.

65645483481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17746965 (or 17746959 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 54.

The spelling of 65645483481 in words is "sixty-five billion, six hundred forty-five million, four hundred eighty-three thousand, four hundred eighty-one".