1655581617412 has 24 divisors (see below), whose sum is σ = 2966719109760. Its totient is φ = 808040530080.

The previous prime is 1655581617407. The next prime is 1655581617509. The reversal of 1655581617412 is 2147161855561.

It is a self number, because there is not a number n which added to its sum of digits gives 1655581617412.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11546539 + ... + 11689042.

It is an arithmetic number, because the mean of its divisors is an integer number (123613296240).

Almost surely, 2^{1655581617412} is an apocalyptic number.

It is an amenable number.

1655581617412 is a deficient number, since it is larger than the sum of its proper divisors (1311137492348).

1655581617412 is a wasteful number, since it uses less digits than its factorization.

1655581617412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23236011 (or 23236009 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 52.

The spelling of 1655581617412 in words is "one trillion, six hundred fifty-five billion, five hundred eighty-one million, six hundred seventeen thousand, four hundred twelve".