1644940920114 has 48 divisors (see below), whose sum is σ = 3717404675712. Its totient is φ = 545144169168.

The previous prime is 1644940920101. The next prime is 1644940920169. The reversal of 1644940920114 is 4110290494461.

1644940920114 is a `hidden beast` number, since 1 + 6 + 449 + 4 + 0 + 92 + 0 + 114 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1644940920114.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9698154 + ... + 9866309.

It is an arithmetic number, because the mean of its divisors is an integer number (77445930744).

Almost surely, 2^{1644940920114} is an apocalyptic number.

1644940920114 is an abundant number, since it is smaller than the sum of its proper divisors (2072463755598).

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

1644940920114 is a wasteful number, since it uses less digits than its factorization.

1644940920114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19564653 (or 19564641 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 1644940920114 in words is "one trillion, six hundred forty-four billion, nine hundred forty million, nine hundred twenty thousand, one hundred fourteen".