12385721753834 has 32 divisors (see below), whose sum is σ = 22530670041600. Its totient is φ = 5029167412800.

The previous prime is 12385721753789. The next prime is 12385721753851. The reversal of 12385721753834 is 43835712758321.

It is a happy number.

It is a super-2 number, since 2×12385721753834² (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, 698486609 + ... + 698504340.

It is an arithmetic number, because the mean of its divisors is an integer number (704083438800).

Almost surely, 2^{12385721753834} is an apocalyptic number.

12385721753834 is a deficient number, since it is larger than the sum of its proper divisors (10144948287766).

12385721753834 is a wasteful number, since it uses less digits than its factorization.

12385721753834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396991006.

The product of its digits is 33868800, while the sum is 59.

The spelling of 12385721753834 in words is "twelve trillion, three hundred eighty-five billion, seven hundred twenty-one million, seven hundred fifty-three thousand, eight hundred thirty-four".