2102543450505 has 12 divisors (see below), whose sum is σ = 3644408647620. Its totient is φ = 1121356506912.

The previous prime is 2102543450479. The next prime is 2102543450521. The reversal of 2102543450505 is 5050543452012.

2102543450505 is a `hidden beast` number, since 2 + 10 + 2 + 543 + 4 + 50 + 50 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 240554935296 + 1861988515209 = 490464^2 + 1364547^2 .

It is not a de Polignac number, because 2102543450505 - 2¹⁰ = 2102543449481 is a prime.

It is a super-2 number, since 2×2102543450505² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2102543450505.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23361593850 + ... + 23361593939.

It is an arithmetic number, because the mean of its divisors is an integer number (303700720635).

Almost surely, 2^{2102543450505} is an apocalyptic number.

It is an amenable number.

2102543450505 is a deficient number, since it is larger than the sum of its proper divisors (1541865197115).

2102543450505 is a wasteful number, since it uses less digits than its factorization.

2102543450505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46723187800 (or 46723187797 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 2102543450505 in words is "two trillion, one hundred two billion, five hundred forty-three million, four hundred fifty thousand, five hundred five".