1826865728349 has 4 divisors (see below), whose sum is σ = 2435820971136. Its totient is φ = 1217910485564.

The previous prime is 1826865728329. The next prime is 1826865728377. The reversal of 1826865728349 is 9438275686281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1826865728349 - 2²⁴ = 1826848951133 is a prime.

It is a super-2 number, since 2×1826865728349² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1826865728329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304477621389 + ... + 304477621394.

It is an arithmetic number, because the mean of its divisors is an integer number (608955242784).

Almost surely, 2^{1826865728349} is an apocalyptic number.

It is an amenable number.

1826865728349 is a deficient number, since it is larger than the sum of its proper divisors (608955242787).

1826865728349 is an equidigital number, since it uses as much as digits as its factorization.

1826865728349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608955242786.

The product of its digits is 278691840, while the sum is 69.

The spelling of 1826865728349 in words is "one trillion, eight hundred twenty-six billion, eight hundred sixty-five million, seven hundred twenty-eight thousand, three hundred forty-nine".