1611560605012 has 12 divisors (see below), whose sum is σ = 2820623189076. Its totient is φ = 805668265280.

The previous prime is 1611560605007. The next prime is 1611560605019. The reversal of 1611560605012 is 2105060651161.

It can be written as a sum of positive squares in 2 ways, for example, as 239743412496 + 1371817192516 = 489636^2 + 1171246^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611560605019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27976939 + ... + 28034482.

It is an arithmetic number, because the mean of its divisors is an integer number (235051932423).

Almost surely, 2^{1611560605012} is an apocalyptic number.

It is an amenable number.

1611560605012 is a deficient number, since it is larger than the sum of its proper divisors (1209062584064).

1611560605012 is a wasteful number, since it uses less digits than its factorization.

1611560605012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56018618 (or 56018616 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 1611560605012 in words is "one trillion, six hundred eleven billion, five hundred sixty million, six hundred five thousand, twelve".