2145869733866 has 8 divisors (see below), whose sum is σ = 3219143557860. Its totient is φ = 1072821881248.

The previous prime is 2145869733829. The next prime is 2145869733869. The reversal of 2145869733866 is 6683379685412.

It can be written as a sum of positive squares in 2 ways, for example, as 2099951672641 + 45918061225 = 1449121^2 + 214285^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2145869733796 and 2145869733805.

It is not an unprimeable number, because it can be changed into a prime (2145869733869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56469101 + ... + 56507088.

Almost surely, 2^{2145869733866} is an apocalyptic number.

2145869733866 is a deficient number, since it is larger than the sum of its proper divisors (1073273823994).

2145869733866 is a wasteful number, since it uses less digits than its factorization.

2145869733866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112985688.

The product of its digits is 313528320, while the sum is 68.

The spelling of 2145869733866 in words is "two trillion, one hundred forty-five billion, eight hundred sixty-nine million, seven hundred thirty-three thousand, eight hundred sixty-six".