1561606655112 has 48 divisors (see below), whose sum is σ = 4833544410240. Its totient is φ = 446173329888.

The previous prime is 1561606655093. The next prime is 1561606655117. The reversal of 1561606655112 is 2115566061651.

1561606655112 is a `hidden beast` number, since 15 + 6 + 1 + 60 + 6 + 65 + 511 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1561606655117) 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 11 ways as a sum of consecutive naturals, for example, 1549212448 + ... + 1549213455.

It is an arithmetic number, because the mean of its divisors is an integer number (100698841880).

Almost surely, 2^{1561606655112} is an apocalyptic number.

1561606655112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561606655112 is an abundant number, since it is smaller than the sum of its proper divisors (3271937755128).

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

1561606655112 is a wasteful number, since it uses less digits than its factorization.

1561606655112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098425922 (or 3098425915 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The spelling of 1561606655112 in words is "one trillion, five hundred sixty-one billion, six hundred six million, six hundred fifty-five thousand, one hundred twelve".