2100360344645 has 16 divisors (see below), whose sum is σ = 2568148062192. Its totient is φ = 1648481802240.

The previous prime is 2100360344639. The next prime is 2100360344647. The reversal of 2100360344645 is 5464430630012.

It is a Cunningham number, because it is equal to 1449262²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 15822117796 + 2084538226849 = 125786^2 + 1443793^2 .

It is not a de Polignac number, because 2100360344645 - 2²⁸ = 2100091909189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100360344599 and 2100360344608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100360344647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4152725 + ... + 4630965.

It is an arithmetic number, because the mean of its divisors is an integer number (160509253887).

Almost surely, 2^{2100360344645} is an apocalyptic number.

It is an amenable number.

2100360344645 is a deficient number, since it is larger than the sum of its proper divisors (467787717547).

2100360344645 is a wasteful number, since it uses less digits than its factorization.

2100360344645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494872.

The product of its (nonzero) digits is 207360, while the sum is 38.

Adding to 2100360344645 its reverse (5464430630012), we get a palindrome (7564790974657).

The spelling of 2100360344645 in words is "two trillion, one hundred billion, three hundred sixty million, three hundred forty-four thousand, six hundred forty-five".