6561200160005 has 4 divisors (see below), whose sum is σ = 7873440192012. Its totient is φ = 5248960128000.

The previous prime is 6561200160001. The next prime is 6561200160023. The reversal of 6561200160005 is 5000610021656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3382193177476 + 3179006982529 = 1839074^2 + 1782977^2 .

It is not a de Polignac number, because 6561200160005 - 2² = 6561200160001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6561200160001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656120015996 + ... + 656120016005.

It is an arithmetic number, because the mean of its divisors is an integer number (1968360048003).

Almost surely, 2^{6561200160005} is an apocalyptic number.

It is an amenable number.

6561200160005 is a deficient number, since it is larger than the sum of its proper divisors (1312240032007).

6561200160005 is a wasteful number, since it uses less digits than its factorization.

6561200160005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312240032006.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 6561200160005 in words is "six trillion, five hundred sixty-one billion, two hundred million, one hundred sixty thousand, five".