2001656017012 has 24 divisors (see below), whose sum is σ = 3511575385416. Its totient is φ = 998349539328.

The previous prime is 2001656017003. The next prime is 2001656017019. The reversal of 2001656017012 is 2107106561002.

It can be written as a sum of positive squares in 4 ways, for example, as 7900720996 + 1993755296016 = 88886^2 + 1412004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001656017019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10598028 + ... + 10785244.

It is an arithmetic number, because the mean of its divisors is an integer number (146315641059).

Almost surely, 2^{2001656017012} is an apocalyptic number.

It is an amenable number.

2001656017012 is a deficient number, since it is larger than the sum of its proper divisors (1509919368404).

2001656017012 is a wasteful number, since it uses less digits than its factorization.

2001656017012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193827 (or 193825 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 2001656017012 in words is "two trillion, one billion, six hundred fifty-six million, seventeen thousand, twelve".