12773801749 has 4 divisors (see below), whose sum is σ = 12817398636. Its totient is φ = 12730204864.

The previous prime is 12773801723. The next prime is 12773801753. The reversal of 12773801749 is 94710837721.

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 12389916100 + 383885649 = 111310^2 + 19593^2 .

It is a cyclic number.

It is not a de Polignac number, because 12773801749 - 2⁹ = 12773801237 is a prime.

It is a super-2 number, since 2×12773801749² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12773802749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21798004 + ... + 21798589.

It is an arithmetic number, because the mean of its divisors is an integer number (3204349659).

Almost surely, 2^12773801749 is an apocalyptic number.

It is an amenable number.

12773801749 is a deficient number, since it is larger than the sum of its proper divisors (43596887).

12773801749 is an equidigital number, since it uses as much as digits as its factorization.

12773801749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43596886.

The product of its (nonzero) digits is 592704, while the sum is 49.

The spelling of 12773801749 in words is "twelve billion, seven hundred seventy-three million, eight hundred one thousand, seven hundred forty-nine".