12735726357 has 4 divisors (see below), whose sum is σ = 16980968480. Its totient is φ = 8490484236.

The previous prime is 12735726337. The next prime is 12735726383. The reversal of 12735726357 is 75362753721.

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 not a de Polignac number, because 12735726357 - 2¹⁸ = 12735464213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12735726337) 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, 2122621057 + ... + 2122621062.

It is an arithmetic number, because the mean of its divisors is an integer number (4245242120).

Almost surely, 2^12735726357 is an apocalyptic number.

It is an amenable number.

12735726357 is a deficient number, since it is larger than the sum of its proper divisors (4245242123).

12735726357 is an equidigital number, since it uses as much as digits as its factorization.

12735726357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245242122.

The product of its digits is 1852200, while the sum is 48.

The spelling of 12735726357 in words is "twelve billion, seven hundred thirty-five million, seven hundred twenty-six thousand, three hundred fifty-seven".