427264216665 has 32 divisors (see below), whose sum is σ = 803137216896. Its totient is φ = 191223144960.

The previous prime is 427264216657. The next prime is 427264216693. The reversal of 427264216665 is 566612462724.

It is a happy number.

It is not a de Polignac number, because 427264216665 - 2³ = 427264216657 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99593244 + ... + 99597533.

It is an arithmetic number, because the mean of its divisors is an integer number (25098038028).

Almost surely, 2^427264216665 is an apocalyptic number.

It is an amenable number.

427264216665 is a deficient number, since it is larger than the sum of its proper divisors (375873000231).

427264216665 is a wasteful number, since it uses less digits than its factorization.

427264216665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199190809.

The product of its digits is 5806080, while the sum is 51.

The spelling of 427264216665 in words is "four hundred twenty-seven billion, two hundred sixty-four million, two hundred sixteen thousand, six hundred sixty-five".