1605056665012 has 24 divisors (see below), whose sum is σ = 2904156622080. Its totient is φ = 775381548480.

The previous prime is 1605056664941. The next prime is 1605056665061. The reversal of 1605056665012 is 2105666505061.

It is a self number, because there is not a number n which added to its sum of digits gives 1605056665012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10412962 + ... + 10565977.

It is an arithmetic number, because the mean of its divisors is an integer number (121006525920).

Almost surely, 2^{1605056665012} is an apocalyptic number.

It is an amenable number.

1605056665012 is a deficient number, since it is larger than the sum of its proper divisors (1299099957068).

1605056665012 is a wasteful number, since it uses less digits than its factorization.

1605056665012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20979591 (or 20979589 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 1605056665012 in words is "one trillion, six hundred five billion, fifty-six million, six hundred sixty-five thousand, twelve".