427940495809 has 4 divisors (see below), whose sum is σ = 442697064660. Its totient is φ = 413183926960.

The previous prime is 427940495789. The next prime is 427940495849. The reversal of 427940495809 is 908594049724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 335629042225 + 92311453584 = 579335^2 + 303828^2 .

It is a cyclic number.

It is not a de Polignac number, because 427940495809 - 2⁵ = 427940495777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427940495849) 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, 7378284382 + ... + 7378284439.

It is an arithmetic number, because the mean of its divisors is an integer number (110674266165).

Almost surely, 2^427940495809 is an apocalyptic number.

It is an amenable number.

427940495809 is a deficient number, since it is larger than the sum of its proper divisors (14756568851).

427940495809 is a wasteful number, since it uses less digits than its factorization.

427940495809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14756568850.

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 427940495809 in words is "four hundred twenty-seven billion, nine hundred forty million, four hundred ninety-five thousand, eight hundred nine".