1643564345140 has 24 divisors (see below), whose sum is σ = 3451638506400. Its totient is φ = 657396522528.

The previous prime is 1643564345117. The next prime is 1643564345207. The reversal of 1643564345140 is 415434653461.

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, 1361790 + ... + 2267509.

It is an arithmetic number, because the mean of its divisors is an integer number (143818271100).

Almost surely, 2^{1643564345140} is an apocalyptic number.

1643564345140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1643564345140 is an abundant number, since it is smaller than the sum of its proper divisors (1808074161260).

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

1643564345140 is a wasteful number, since it uses less digits than its factorization.

1643564345140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3651951 (or 3651949 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 1643564345140 in words is "one trillion, six hundred forty-three billion, five hundred sixty-four million, three hundred forty-five thousand, one hundred forty".