210561164144560 has 40 divisors (see below), whose sum is σ = 490145243227920. Its totient is φ = 84122867964672.

The previous prime is 210561164144521. The next prime is 210561164144587. The reversal of 210561164144560 is 65441461165012.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 210561164144560.

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, 1587397222 + ... + 1587529861.

It is an arithmetic number, because the mean of its divisors is an integer number (12253631080698).

Almost surely, 2^{210561164144560} is an apocalyptic number.

210561164144560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210561164144560 is an abundant number, since it is smaller than the sum of its proper divisors (279584079083360).

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

210561164144560 is a wasteful number, since it uses less digits than its factorization.

210561164144560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174927925 (or 3174927919 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 210561164144560 in words is "two hundred ten trillion, five hundred sixty-one billion, one hundred sixty-four million, one hundred forty-four thousand, five hundred sixty".