2140816701409 has 3 divisors (see below), whose sum is σ = 2140818164563. Its totient is φ = 2140815238256.

The previous prime is 2140816701347. The next prime is 2140816701461. The reversal of 2140816701409 is 9041076180412.

The square root of 2140816701409 is 1463153.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 16428830625 + 2124387870784 = 128175^2 + 1457528^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2140816701409 is a prime.

It is a super-2 number, since 2×2140816701409² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2140816701469) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 731577 + ... + 2194729.

Almost surely, 2^{2140816701409} is an apocalyptic number.

2140816701409 is the 1463153-rd square number.

2140816701409 is the 731577-th centered octagonal number.

It is an amenable number.

2140816701409 is a deficient number, since it is larger than the sum of its proper divisors (1463154).

2140816701409 is an frugal number, since it uses more digits than its factorization.

2140816701409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926306 (or 1463153 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 2140816701409 in words is "two trillion, one hundred forty billion, eight hundred sixteen million, seven hundred one thousand, four hundred nine".