2161327546644 has 24 divisors (see below), whose sum is σ = 5763540124608. Its totient is φ = 617522156160.

The previous prime is 2161327546613. The next prime is 2161327546661. The reversal of 2161327546644 is 4466457231612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12865044837 + ... + 12865045004.

It is an arithmetic number, because the mean of its divisors is an integer number (240147505192).

Almost surely, 2^{2161327546644} is an apocalyptic number.

It is an amenable number.

2161327546644 is an abundant number, since it is smaller than the sum of its proper divisors (3602212577964).

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

2161327546644 is a wasteful number, since it uses less digits than its factorization.

2161327546644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25730089855 (or 25730089853 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 51.

The spelling of 2161327546644 in words is "two trillion, one hundred sixty-one billion, three hundred twenty-seven million, five hundred forty-six thousand, six hundred forty-four".