1601665020012 has 48 divisors (see below), whose sum is σ = 3934328025600. Its totient is φ = 505735732800.

The previous prime is 1601665019951. The next prime is 1601665020017. The reversal of 1601665020012 is 2100205661061.

It is not an unprimeable number, because it can be changed into a prime (1601665020017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1830637 + ... + 2560187.

It is an arithmetic number, because the mean of its divisors is an integer number (81965167200).

Almost surely, 2^{1601665020012} is an apocalyptic number.

1601665020012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1601665020012 is an abundant number, since it is smaller than the sum of its proper divisors (2332663005588).

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

1601665020012 is a wasteful number, since it uses less digits than its factorization.

1601665020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739206 (or 739204 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 1601665020012 in words is "one trillion, six hundred one billion, six hundred sixty-five million, twenty thousand, twelve".