2161461505005 has 96 divisors (see below), whose sum is σ = 4341461454720. Its totient is φ = 1011843463680.

The previous prime is 2161461505001. The next prime is 2161461505037. The reversal of 2161461505005 is 5005051641612.

2161461505005 is a `hidden beast` number, since 2 + 1 + 6 + 146 + 1 + 5 + 0 + 500 + 5 = 666.

It is not a de Polignac number, because 2161461505005 - 2² = 2161461505001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161461505001) 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 95 ways as a sum of consecutive naturals, for example, 383529 + ... + 2114241.

It is an arithmetic number, because the mean of its divisors is an integer number (45223556820).

Almost surely, 2^{2161461505005} is an apocalyptic number.

It is an amenable number.

2161461505005 is an abundant number, since it is smaller than the sum of its proper divisors (2179999949715).

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

2161461505005 is a wasteful number, since it uses less digits than its factorization.

2161461505005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730796 (or 1730761 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 2161461505005 in words is "two trillion, one hundred sixty-one billion, four hundred sixty-one million, five hundred five thousand, five".