320471136561 has 8 divisors (see below), whose sum is σ = 434537134560. Its totient is φ = 210026281472.

The previous prime is 320471136511. The next prime is 320471136577. The reversal of 320471136561 is 165631174023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320471136561 - 2²⁷ = 320336918833 is a prime.

It is a super-2 number, since 2×320471136561² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320471136511) 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 7 ways as a sum of consecutive naturals, for example, 905285520 + ... + 905285873.

It is an arithmetic number, because the mean of its divisors is an integer number (54317141820).

Almost surely, 2^320471136561 is an apocalyptic number.

It is an amenable number.

320471136561 is a deficient number, since it is larger than the sum of its proper divisors (114065997999).

320471136561 is a wasteful number, since it uses less digits than its factorization.

320471136561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810571455.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 320471136561 in words is "three hundred twenty billion, four hundred seventy-one million, one hundred thirty-six thousand, five hundred sixty-one".