2105576042345 has 4 divisors (see below), whose sum is σ = 2526691250820. Its totient is φ = 1684460833872.

The previous prime is 2105576042333. The next prime is 2105576042371. The reversal of 2105576042345 is 5432406755012.

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 795899505424 + 1309676536921 = 892132^2 + 1144411^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105576042345 - 2¹⁴ = 2105576025961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2105576042296 and 2105576042305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210557604230 + ... + 210557604239.

It is an arithmetic number, because the mean of its divisors is an integer number (631672812705).

Almost surely, 2^{2105576042345} is an apocalyptic number.

It is an amenable number.

2105576042345 is a deficient number, since it is larger than the sum of its proper divisors (421115208475).

2105576042345 is an equidigital number, since it uses as much as digits as its factorization.

2105576042345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421115208474.

The product of its (nonzero) digits is 1008000, while the sum is 44.

The spelling of 2105576042345 in words is "two trillion, one hundred five billion, five hundred seventy-six million, forty-two thousand, three hundred forty-five".