2340786781369 has 3 divisors (see below), whose sum is σ = 2340788311333. Its totient is φ = 2340785251406.

The previous prime is 2340786781349. The next prime is 2340786781387. The reversal of 2340786781369 is 9631876870432.

The square root of 2340786781369 is 1529963.

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 is not a de Polignac number, because 2340786781369 - 2¹¹ = 2340786779321 is a prime.

It is a super-2 number, since 2×2340786781369² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2340786781369.

It is not an unprimeable number, because it can be changed into a prime (2340786781349) 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, 764982 + ... + 2294944.

Almost surely, 2^{2340786781369} is an apocalyptic number.

2340786781369 is the 1529963-rd square number.

2340786781369 is the 764982-nd centered octagonal number.

It is an amenable number.

2340786781369 is a deficient number, since it is larger than the sum of its proper divisors (1529964).

2340786781369 is an frugal number, since it uses more digits than its factorization.

2340786781369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059926 (or 1529963 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 64.

Multiplying 2340786781369 by its sum of digits (64), we get a square (149810354007616 = 12239704²).

The spelling of 2340786781369 in words is "two trillion, three hundred forty billion, seven hundred eighty-six million, seven hundred eighty-one thousand, three hundred sixty-nine".