331346067561 has 6 divisors (see below), whose sum is σ = 478610986490. Its totient is φ = 220897378368.

The previous prime is 331346067553. The next prime is 331346067581. The reversal of 331346067561 is 165760643133.

331346067561 is a `hidden beast` number, since 3 + 3 + 1 + 34 + 606 + 7 + 5 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 257511591936 + 73834475625 = 507456^2 + 271725^2 .

It is not a de Polignac number, because 331346067561 - 2³ = 331346067553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331346067581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18408114856 + ... + 18408114873.

Almost surely, 2^331346067561 is an apocalyptic number.

It is an amenable number.

331346067561 is a deficient number, since it is larger than the sum of its proper divisors (147264918929).

331346067561 is a wasteful number, since it uses less digits than its factorization.

331346067561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36816229735 (or 36816229732 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 331346067561 in words is "three hundred thirty-one billion, three hundred forty-six million, sixty-seven thousand, five hundred sixty-one".