12385721753835 has 16 divisors (see below), whose sum is σ = 19817290444320. Its totient is φ = 6605673056000.

The previous prime is 12385721753789. The next prime is 12385721753851. The reversal of 12385721753835 is 53835712758321.

It is a happy number.

12385721753835 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12385721753835 - 2²⁶ = 12385654644971 is a prime.

It is a super-2 number, since 2×12385721753835² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499416 + ... + 5002085.

It is an arithmetic number, because the mean of its divisors is an integer number (1238580652770).

Almost surely, 2^{12385721753835} is an apocalyptic number.

12385721753835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12385721753835 is a deficient number, since it is larger than the sum of its proper divisors (7431568690485).

12385721753835 is a wasteful number, since it uses less digits than its factorization.

12385721753835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5651598.

The product of its digits is 42336000, while the sum is 60.

The spelling of 12385721753835 in words is "twelve trillion, three hundred eighty-five billion, seven hundred twenty-one million, seven hundred fifty-three thousand, eight hundred thirty-five".