8309609622405 has 144 divisors (see below), whose sum is σ = 18313037293824. Its totient is φ = 3454136421120.

The previous prime is 8309609622373. The next prime is 8309609622421. The reversal of 8309609622405 is 5042269069038.

It is a happy number.

8309609622405 is a `hidden beast` number, since 8 + 3 + 0 + 9 + 6 + 0 + 9 + 622 + 4 + 0 + 5 = 666.

It is not a de Polignac number, because 8309609622405 - 2⁵ = 8309609622373 is a prime.

It is a super-2 number, since 2×8309609622405² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 242781 + ... + 4083890.

It is an arithmetic number, because the mean of its divisors is an integer number (127173870096).

Almost surely, 2^{8309609622405} is an apocalyptic number.

It is an amenable number.

8309609622405 is an abundant number, since it is smaller than the sum of its proper divisors (10003427671419).

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

8309609622405 is a wasteful number, since it uses less digits than its factorization.

8309609622405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326776 (or 4326766 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 8309609622405 in words is "eight trillion, three hundred nine billion, six hundred nine million, six hundred twenty-two thousand, four hundred five".