3561605771361 has 64 divisors (see below), whose sum is σ = 5316123648000. Its totient is φ = 2120478497280.

The previous prime is 3561605771351. The next prime is 3561605771387. The reversal of 3561605771361 is 1631775061653.

It is not a de Polignac number, because 3561605771361 - 2¹⁰ = 3561605770337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3561605771351) 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 63 ways as a sum of consecutive naturals, for example, 62745585 + ... + 62802321.

It is an arithmetic number, because the mean of its divisors is an integer number (83064432000).

Almost surely, 2^{3561605771361} is an apocalyptic number.

It is an amenable number.

3561605771361 is a deficient number, since it is larger than the sum of its proper divisors (1754517876639).

3561605771361 is a wasteful number, since it uses less digits than its factorization.

3561605771361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57051 (or 57029 counting only the distinct ones).

The product of its (nonzero) digits is 2381400, while the sum is 51.

The spelling of 3561605771361 in words is "three trillion, five hundred sixty-one billion, six hundred five million, seven hundred seventy-one thousand, three hundred sixty-one".